Great concept and design.
I sized it up a bit to fit 0.5l beer bottles and cut the feet. I thought they might not be necessary. But I haven't tested it in the wild yet. I will see if this was a bad idea :D
Printed in TPU 40D so it can be squeezed and needs less space in the backpack.
Update: I tested it and it works great. Thanks to your stabilizer my beer survived successfully a hit from a frisbee. Perfect! I added some more pics.
My print quality was really bad as you can see on the new pics. Since the test was positive I need to print a better one. (edited)
