Beer Bottle Lock




Introduction: Beer Bottle Lock

About: I'm an inventor / maker / designer based in the Bay Area. My background is in residential architecture, film set design, animatronics, media arts, exhibit design, and electronics. I use digital design and fa...

When you have guests over for the holidays, don't cast pearls before swine. Make a 3D-printed bottle lock for the craft beers, and let your friends and family drink the cheap ones. Bah Humbug!

If you want to see me 3D model a version of this project in real-time, check out this webinar I led which was lesson 3 of the Hour of Making Webinar series.

You can also watch the other two lessons here: Hour of Making Lesson 1: Make a Wax Stamp and Hour of Making Lesson 2: Make a Christmas Ornament.

Step 1: Design

The first step in the design is to measure the bottle. The shapes of bottles vary pretty widely, but the caps seem to be totally standard. Because of that I decided to make the lock clamp onto the bottle cap, and left some wiggle room for the size of the neck.

I made the rough shape of the bottle, then designed the lock to be a clamp with a single 4-40 screw as the hinge part. The other end of the clamp has a hole that fits an off-the-shelf luggage padlock I found in a 6-pack at a hardware store.

I used Fusion 360 for the design because it's a great solid modeling tool. It has mechanical assembly functions that let me test out the motion and figure out if it would easily come on and off of the bottle. Fusion 360 is free for students and hobbyists, and there's a ton of educational support on it. If you want to learn to 3D model the kind of work I do, I think this is the best choice on the market. Click the links below to sign up:



Step 2: 3D Printing

I used a Makerbot Replicator 2, but this model would work with practically any 3D printer. When you model Fusion 360 properly, there is no cleanup whatsoever when you prep it for 3D printing. Just bring it into the Makerbot app, position it, and off you go.

This is not a simple monolithic object. There are "overhangs" because the hinge parts interlock and there are holes. So whatever printer you're using, make sure you use supports. The group of 6 took about 6 hours to print.

Step 3: Assembly

I designed it to use a 3/4" long 4-40 machine screw, washer, and nut to be embedded into the bottom of the print. The fit was so tight that the screw ended up threading into the plastic. The nut was totally unnecessary, and in fact it cracked the plastic when I hammered it in, so you could probably leave that out.

Step 4: Keep the Good Stuff to Yourself

You're already spending a fortune on friends and family over the holidays, so save some good stuff for yourself.

8 People Made This Project!


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79 Discussions

Looking for something like this to print that will fit on a gallon milk jug.

have any shop that im can purchase this red bootle lock ?

You can secure your favorite stuff even from yourself.... Cool Project

I dint understand what im supposed to do


2 years ago

Is there a way you could convert this to a solidworks file?

This is awsome. I just wish it would fit regular pop bottles

rotated 180 degrees about Y axis for printing upside down( lettering/top printed on the glass ) so no brim needed at all. Also looking to add just a small fillet/ramp on the middle ridge so no support material would be needed at all. Will be using OpenSCAD for that. I don't care if the hinge part needs a little work on the inside.

ts fine, insteed of screw tak a splint, like this in

Good idea but I would simply unscrew the little bolt. Maybe a rivet or something that can not be removed without breaking it.

I could not find it on quirk whatever,
send the info I sent you the private message about when you have time?

I'm new to fusion 360, I'd like to modify the text do you have any advice?

Did this guy lift your design?

my lock printed on a duplicator 4 with raft and support.turned out great.used a nail as a pin the dropped some epoxy into where the bolt would have gone to trap the head.


Hey Man,

This is Seth, again. I have found a bug in the looking.stl file for IE. It works on Chrome but not in IE. I listed the bug report to the people in case they wanted to notify you.