All design credit goes to Trucologie's design: Camelbak Crux reservoir dryer. This is the same thing, but I made it more robust by making it thicker. The original design broke quickly for me. This one should last longer.

Lottmax Shark v2

Yes

No

20%

This would probably work fine with PLA, but I used ABS because it is a pretty small part, so the cost was not a big concern. It might work without the raft, but I use a raft for ABS as a matter of course.