Tired of holding your drink, want to buy food but you don't have enough hands, want to roll your cigarette or just move from one stage to another freely ? Behold fellow music festival lovers, the Drink Holder has arrived !

In European music festivals, we have those so called eco-cups (plastic glass that are reusable) that don't vary much in size from one place to another. So, why not create a drink holder compatible with a lot of different sizes to free your hands during your favorite event ?

For this project, I was limited by the size of my 3D printer, a small printrbot simple with a printing area of 10x10cm. Therefore this drink holder cannot hold more than a 25cl glass (I see you all laughing "haha, real men only drink pints" but hey, that's a first try ;) )

The CAD files are in step 1. Feel free to modify it, and of course any advice and feedback will be much appreciated :)

What you will need for this project :

A 3D printer, or you can use 3D Hubs for exemple ;
40cm of strap you can find in any local store. I used a 30mm wide, but you can go up to 40 ;
A sewing needle and some sewing thread.

Step 1: Print and Get the Parts

With the STL files below, you will have no problem to print in a 10x10x10 volume. I used a 30% infill and 2 passes for the perimeters, with 3 solid layers for both the top and the bottom. No support needed.

POR_000.stp is the main assembly in step file, you can open it in nearly every CAD software
The 3 files below are the one you can print as it is :
- POR_001.stl is the holder
- POR_003.stl is the top part
- POR_004.stl is the buckle
PG Drink Holder.zip is the archived folder of the assembly in Autodesk Inventor format (.iam for assembly and .ipt for part).

You can modify the part as you like, easier to do if you have Inventor (maybe the parts format is compatible with Autodesk Fusion 360 that is free but I did not check).

You will also need :

40cm of strap you can find in any local store, I used a 30mm wide, but you can go up to 40 ; You can buy 1m for example and then easily cut it again at home to suit your build.
A sewing needle and some sewing thread.

Step 2: Assemble and Use Your Unique Sewing Skills

Take your needle and your thread. The only thing you need to do here is assemble the drink holder as shown on the pictures and sew both ends of the strap to prevent it from coming out.

And that's it !

Step 3: Have Fun !

Pass the belt in the holder and on your trousers, clip the buckle and you're all set !

This is a first prototype, and I know there is a lot of room for improvements.

Some remarks and improvement possibilities as I tried a few things :

Do NOT run with your beer, not because the buckle goes loose nor the drink splashes, but because this heavenly drink loses its sparkle ;
The buckle is to be modified a bit, no guiding here so it can bend before it goes loose ;
Maybe add a seal on the top part that could be printed with flexible filament. Conical shape which can accommodate multiple glass diameters ;
Thinking of a foldable version.

Thanks for reading my first Instructables ! If you liked it, you can click vote for the contests I'm in.

Cheers !