As summer is coming, its a must to have some water with you, but if you carry the bottles by hand the water will warm up which I hate.

Here is the solution: easy print in place, no supports, ergonomic for my fingers, easy to swap from bottle to bottle and when i need my hand free i always have a carabine and fix it on my belt.

Just a little caution: let it cool before you try to move it, with care. Warm might twist the hinges.