Jan 20, 2018

50 Cool Things to 3D Print Which Are Actually Useful

Bored of pointless 3D printer projects? Stuck for ideas? Presenting a list of cool things to 3D print which are genuinely useful.

Like us, you’re tremendously excited by the possibilities of 3D printing. Unfortunately, the landscape is cluttered with trinkets, doodads and ornaments. We’re in danger of drowning in 3D printed objects that nobody wants or needs.

Fight the tide of mediocrity! Let’s make stuff that’s actually useful! Here’s a list of cool things to 3D print, right now, today. Prove to your nearest and dearest that there’s an everyday and practical application of this wonderful technology.

If you don’t have access to a 3D printer, you can still have the 3D models printed by a professional 3D printing service. To find the best price, please use All3DP’s 3D Printing Price Comparison Service.

Don’t miss: Free STL Files & 3D Printer Models - 34 Best Sites

Cool Things to 3D Print in 5 Easy Steps

  1. Browse this list of cool things to 3D print for inspiration and ideas. Go ahead, take your time, we’ll be here when you get back.
  2. Download the STL file for your chosen model. Click on the link to take you to the site where the files are hosted, and you can download them absolutely free. Please note that some sites may require registration before you can download.
  3. Slice the STL file to prepare it for 3D printing. Whether you use an open source application like Cura or a paid solution like Simplify3D, slicing is a critical step for the quality of your model. Open the STL file and tinker with settings like infill, layer height, and supports.
  4. Convert the STL file into GCode after you’re done slicing. Save the GCode and upload it to your 3D printer, either using a USB cable, an SD card, or a network connection. Now get printing!
  5. Alternatively, use a Service if you don’t have access to a 3D printer. Simply upload the STL files to All3DP’s Best Price 3D Printing Service to have any of these cool things 3D printed.

Beginners / Single Part Projects

1

Everyday Carry Cool Things to 3D Print Survival Whistle

This is a survival whistle of completely original design, which is rugged, easy to make and carry, and is very loud. How loud? Try 118 decibels for size! That’s more than enough to get you noticed in an emergency situation.

Who made it: Joe Zisa

Where to download: Thingiverse

2

Audio Cool Things to 3D Print Groovi Monster Sound Amplifier

This is a passive amplifier for your smartphone, which adds a little extra “oomph” to those tinny speakers when blasting out your tunes. What’s not so passive are those outstretched arms. It’s not called a Groovi Monster for nothing.

Who made it: 3DShook

Where to download: Cults3D

3

Mechanical Wonder Cool Things to 3D Print Platform Jack

This is a fully assembled platform jack, 3D printed as one piece. No messing around with multiple parts. The adjustable height can be used to raise or prop up an object of reasonable weight.

Who made it: Intentional3D

Where to download it: Thingiverse

4

Kitchen Cool Things to 3D Print Measuring Cube

The feelgood success story of 3D printing in 2018 is already here; a simple but totally ingenious measuring cube for use in the kitchen. Each side of the cube has a slot to measure out a foodstuff in either cups (for American cooking) or metric (for everyone else). Best printed in PETG material to maximize food safety.

Who made it: iomaa

Where to download: Thingiverse

5

Household Cool Things to 3D Print Parametric Hinge

Designed in OpenSCAD, this is a parametric butt hinge that can be fully customized for your specific needs. Moreover, you can print it in one step, as individual leaves, or without a pin at the centre.

Who made it: Rohin Gosling

Where to download: Thingiverse

6

Travel Cool Things to 3D Print Sunglasses Car Sun Visor Clip

A useful item to keep you looking cool on sunny days; a car sun visor clip where you can affix you sunglasses when not in use (but still need easy access).

Who made it: Trevor Long

Where to download: Thingiverse

7

Kitchen Cool Things to 3D Print Jumbo Elephant Cutlery Drainer

This is a fantastically useful item that, at first glance, might be mistaken for a planter. In actual fact it’s a cutlery drainer in the shape of low-poly elephant, where the trunk is used to drain excess water while your knives and forks are drying.

Who made it: Alejandro Gabriel Iovane

Where to download: Thingiverse

8

Household Cool Things to 3D Print HODOR Doorstop

This doorstop that pays tribute to a much-loved character from the Game of Thrones pop culture juggernaut. To explain why a doorstop is named after Hodor would ruin the joke. So this is where we put a SPOILER ALERT for an episode of a TV show that aired several years ago. Wait, did we explain that back-to-front? Oh well…

Who made it: Stereolab

Where to download: Thingiverse

9

Everyday Carry Cool Things to 3D Print Super Best Bottle Opener

Unlike the vast majority of 3D printed bottle openers out there, this model doesn’t need a coin or other additional elements to provide the necessary leverage. Instead, its ergonomic design uses a curved prying edge that catches on a substantial amount of the sharp cap edge.

Who made it: Jeremy Peterson

Where to download: Thingiverse

10

Hand Tools Cool Things to 3D Print Pages Holder

A simple but ingenious life-hack for those who like to read good old fashioned books. You know, those stacks of pressed wood fiber, embossed with glyphs that induce shared hallucinations. Keep a book open comfortably using one hand with this page holder.

Who made it: Ales Strucovsky

Where to download: Thingiverse

11

Kitchen & Dining Cool Things to 3D Print Caffeine Molecule Drinks Coaster

You love coffee, we love coffee, everybody loves coffee. But you know what no-one likes? Ugly brown rings. Ugh! Banish them from your table with this smart drinks coaster in the shape of the caffeine molecule.

Who made it: Ejo Schrama

Where to download: Thingiverse

12

Audio Cool Things to 3D Print Headphone Stand

For those folks spending any amount of time listening to music at their desk, a decent headphone stand is a crucial accessory. Sure, you could have an ordinary headset stand, or you could make some big audio dynamite with a 3D printed headphone stand. Choose wisely!

Who made it: MakerBot

Where to download: Thingiverse

13

Kitchen & Dining Cool Things to 3D Print Sliding Bag Clip

Sometimes it’s the simplest items which prove to be the most useful. And so it is with this sliding bag clip, which is printed with two parts that can securely hold packets closed. Perfect if you want to keep your herbs and spices fresh but don’t have a jar, or maybe you want to hold off on scarfing a full bag of chips.

Who made it: Walter Hsiao

Where to download: Thingiverse

14

Household Cool Things to 3D Print Customizable U-Hook

This is a set of parametric u-hooks, which are suitable for universal use and very strong. How strong? One hook was used to hold a plastic bag full of heavy books weighing 47.4 kg. Use either the four sample hooks supplied, or adapt and modify for your own use with the supplied CAD files.

Who made it: Serge Payen

Where to download: Thingiverse

15

Hand Tools Cool Things to 3D Print Plastic Wrench

Fully articulated plastic wrench, for general purpose, er, wrenching around the house.

Who made it: Daniel Noree

Where to download: Thingiverse

16

Electronics Cool Things to 3D Print AA to C Battery Adapter

Did you know that the only difference between a C battery and an AA battery is the size? Despite offering the same voltage, the bigger batteries are significantly more expensive to buy. This neat little hack allows you to quickly and safely adapt an AA battery into C size for your electrical appliances.

Who made it: Jwags55

Where to download: Thingiverse

17

Household Cool Things to 3D Print Shopping Bag Handle

We’ve all been there. Trudging back home from the supermarket, laden with shopping bags. The forces of gravity are biting the plastic into your hands, amirite? NO MORE. Print off these shopping bag handles, and sore hands are a thing of the past!

Who made it: Walter Hsiao

Where to download: Thingiverse

18

Hand Tools Cool Things to 3D Print One-handed Bottle Opener

This boomerang shaped one-handed bottle opener helps people with difficulties in performing movements or activities which require hand strength, such as opening a plastic bottle. Print one off and give it to your grandma; she’ll love you for it.

Who made it: PiuLAB

Where to download: Cults3D

19

Household Cool Things to 3D Print Jar Handle

Upcycle an empty jam jar with a 3D printed handle. What could be simpler?

Who made it: le FabShop

Where to download: YouMagine

20

Outdoor Cool Things to 3D Print Car Windshield Ice Scraper

Winter is coming. Or in some cases, it’s already here. Quickly and easily remove the snow and ice from your car windshield with this handy-dandy ice-scraper. It prints without supports, and has a hole for a cord-loop on the end.

Who made it: Tony D.

Where to download: Thingiverse

Intermediate / Multi Part Projects

21

Household Cool Things to 3D Print Self-Watering Planter

Houseplants dying from neglect? NEVER AGAIN. Print off this automatic plant waterer, and your conscience will remain clean. Particularly useful for kitchen herbs, where you can make them last up to a week longer by re-potting in this natty device.

Who made it: Parallel Goods

Where to download it: Cults3D

22

Accessories Cool Things to 3D Print Labyrinth Gift Box

When it comes to giving gifts, cash is not the most imaginative of presents. Wrap up your notes in a more exciting package with this Labyrinth Gift Box. There’s only one correct path, so the lucky recipient will have to work at it a fair bit to unlock the prize tucked inside.

Who made it: Robert

Where to download: Thingiverse

23

Audio Cool Things to 3D Print Earbud Holder

We spend a small fortune on our earphones for music on the move, but not enough to protect them when not in use. Securely stash those buds in this 3D printed earbud holder.

Who made it: Robert

Where to download it: Thingiverse

24

Bathroom Cool Things to 3D Print Toothpaste Tube Squeezer

Squeeze every last drop of toothpaste from the tube with this toothpaste tube squeezer. It prints in three separate parts, and is wide enough to accommodate most tubes on the market. Not only a cool thing to 3D print, but also something to keep your breath minty fresh.

Who made it: Justin Otten

Where to download it: Thingiverse

25

Kitchen Cool Things to 3D Print Whisky Packaging for the Blind

This is the first in a collection of tactile packaging for the blind and partially sighted. The aim is to help them to enjoy — and assist with differentiating between — different brands of a variety of products. This design features a Braille plaque which reads ‘Glenlivet Archive 21’, sculpted cinnamon sticks and hazelnut (the key palate flavours of this particular scotch) and part of Ballindoch Castle, a notable building from the village in Scotland where Glenlivet originates, and where the distillery is based.

Who made it: Evavooo

Where to download: MyMiniFactory

26

Office Cool Things to 3D Print Web Camera Cover

In an age where online privacy is diminished, fewer people feel comfortable with a front-facing camera on their laptops. Instead of ruining those clean lines with a bit of sticky tape or a post-it note, this 3D printed solution is a sliding door you can afix over the camera, so you can still use it for video-conferencing when you need to.

Who made it: Horizon Lab

Where to download: Thingiverse

27

Bathroom Cool Things to 3D Print Soap Dish

An elegant soap dish for the bathroom, in two separate pieces that are washable. You can also customize the inner tray with your own patterns, if you prefer.

Who made it: PiuLAB

Where to download: Cults3D

28

Tools Cool Things to 3D Print Strong Carabiner Frame

Now, these carabiners are not something you would use in a life-or-death scenario like mountain climbing, but they are pretty tough for less essential applications. Plus, the door of the carabiner has an impressive split-hinge design. We tested the model with some scales and it can hold a load up to 77 lbs in weight!

Who made it: Brian Gray

Where to download: Thingiverse

29

Organization Cool Things to 3D Print Stackable Hex Drawers

Phone charger cables, USB cables, HDMI cables, Thunderbolt cables, DisplayPort cables… Your office space is covered in a spaghetti of cables, are we right? Banish the mess with this set of hex drawers. The design is stackable too, so you can extend the hive as the need arises.

Who made it: Dan O’Connell

Where to download it: Thingiverse

30

Decor Cool Things to 3D Print Wall Outlet Shelf

Put a shelf on your power socket, so you can prop up the phone when charging. This model also has an angled slot that holds your smartphone and tablets in an upright viewing position.

Who made it: Tosh Sayama

Where to download: Thingiverse

31

Tools Cool Things to 3D Print Modular Mounting System

This project is a mounting system for phones, tablets and lightweight cameras. The entire set is incredibly versatile; you can clamp your device to a table, use a freestanding mount, or have it hanging overhead.

Who made it: Ryan Huang

Where to download: Thingiverse

32

Organization Cool Things to 3D Print Stackable Battery Holders

A nice and easy system for sorting your battery collection, with clear labeling and sizing. Not only are these boxes stackable, but they’re wall mountable too.

Who made it: Adoniram Sides

Where to download: Thingiverse

33

Hand Tools Cool Things to 3D Print Hand-Screw Clamp

This is model is a hand-screw clamp, something that’s commonly used in woodworking. It won’t match the strength of an actual clamp, but for low-intensity jobs here and there it still has practical applications. An extraordinary feat of digital design that’s great fun to fabricate and assemble.

Where to find it: jakejake

Where to download: Thingiverse

34

Decor Cool Things to 3D Print Secret Shelf

Keep your precious documents or currency hidden from view in this secret shelf stash.

Who made it: Tosh

Where to download: Thingiverse

35

Accessories Cool Things to 3D Print Side Release Buckle

Have you broken the buckle on your favorite rucksack? Not a problem, simply make yourself a new one. Fabricate a sturdy new side release buckle on your 3D printer, and give that backpack a whole new lease of life. This design works especially well printed in PET filament.

Who made it: Russel Singer

Where to download: Thingiverse

36

DIY Cool Things to 3D Print Sliding Door Bolt

Obviously, this sliding door bolt will not protect you against breaking and entering. It’s made of plastic! But if you want to keep a cabinet or shed door securely closed, this quick and easy design will get the job done.

Who made it: Peter Moore

Where to download: Thingiverse

37

Accessories Cool Things to 3D Print Klots Quick Release Shoelaces

This a 3D printed lacing system, where the two halves of your laces quickly and neatly snap together. But hey, if you’re too busy to even tie your shoelaces, then perhaps a pair of loafers are the better option?

Who made it: Tino Kaartovuori

Where to download: Thingiverse

38

Audio Cool Things to 3D Print Monster Mouth Headphone Holder

If you like to use a large pair of headphones at your desk, then this “monster mouth” could be just what you need. It’s got a print-in-place adjustable clamp so it can be securely attached to your desk, plus additional features to keep the cord from getting tangled.

Who made it: Phil Barrenger

Where to download: Thingiverse

39

Organization Cool Things to 3D Print US Coin Sorter V3.0

Pockets laden with loose change? Impose ORDER on your finances with this coin sorting device. The smart thing is that, with a twist of the hopper, this device can sort the change into the correct denomination based on the size of the coin.

Who made it: Eugene Pentland

Where to download: Thingiverse

40

Household Cool Things to 3D Print Piggy Bank

Keep your loose change safe in this cutesy coin bank in the shape of an overweight pig.

Who made it: 3DShook

Where to download:Cults3D

41

Organization Cool Things to 3D Print Micro SD Card Holder

If you’re a regular user of digital cameras or 3D printers, then you’ll probably have little stacks of micro SD cards dotted around your workspace. Keep up to 18 of them neatly organized with this micro SD card holder.

Who made it: Bernd Gill

Where to download: Thingiverse

42

Everyday Carry Cool Things to 3D Print Stiletto Business Card Case

Impress your fellow executives with this stylish and functional business card case. Each case holds around 20 standard American sized business cards, and comes with a printable “spring” to ensure the topmost card glides smoothly out of the slot.

Who made it: Jeff Kerr

Where to download: Thingiverse

43

Bathroom Cool Things to 3D Print Space Invader Toilet Paper Holder

Brighten up the bathroom with this functional print of a classic Space Invader. Um, holding your toilet paper.

Who made it: Sebisebman

Where to download: YouMagine

Advanced / Complex Projects

44

Garden Cool Things to 3D Print Digital Sundial

Your eyes do not deceive you. This insanely cool thing to 3D print is a digital sundial. And it really does work. The shape of the sundial has been engineered to only let through the right rays at the right time and angle, so it can display the actual time at 20 minute intervals. Operational only during daylight hours, naturally, between 10:00 and 16:00.

Who made it: Mojoptix

Where to download it: Thingiverse

45

DIY Cool Things to 3D Print Customizable Sanding Stick

This is a sophisticated set of customizable sanding sticks, where you can adjust the height, length and width of each stick. You can also tinker with the end styles, so it can be round or wedged depending on the job at hand. Very useful!

Who made it: Dennis H.

Where to download: Thingiverse

46

Garden Cool Things to 3D Print Upcycle Jar Greenhouse

With this cool thing to 3D print, you can upcycle a glass jar into a mini greenhouse for your plants. It also features a water reservoir and a lip to collect condensation water and re-inject it in the reservoir. With the hexagonal design, you can pack them in a honeycomb pattern or mix sizes easily.

Who made it: Julien Krivacsy

Where to download: Thingiverse

This is a chair that anyone with access to a 3D printer can make. All you have to do is assemble the printed parts together with sheets of plywood (which you can find at any hardware store). With some CAD skills, you can even customize it to make the chair more ergonomic, or even create a whole new version.

Who made it: ColorFabb

Where to download: YouMagine

48

Everyday Carry Cool Things to 3D Print Swiss Army Style Key Chain

This is a variation on the classic Swiss Army Knife design that swaps out the blades and can openers for something infinitely more useful — your house-keys. Prints in two halves, and the keys are held in place using standard hex nuts and bolts.

Who made it: Craig Blanchette

Where to download: Thingiverse

49

Household Cool Things to 3D Print Articulated Lamp

This modular, articulated lamp is composed of 6 basic pieces: bottom, trunk, and a top piece which houses an LED Tap Light. More pieces can be added to make the lamp as long as you like.

Who made it: Luca Parmegiani

Where to download: MyMiniFactory

50

Office Cool Things to 3D Print Solo Finger Pen

The solo finger pen is a dramatic flourish on the humble writing instrument, where a mechanical jointed finger and a flexible “BIC” pen transform you into a Steampunk Shakespeare.

Who made it: Bernie Solo

Where to download: Thingiverse

Image credits: All images copyright their respective owners

License: The text of "50 Cool Things to 3D Print Which Are Actually Useful" by All3DP is licensed under a Creative Commons Attribution 4.0 International License.

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