A basic Protector for cylindric waterbottles.
The diameter is 100mm, so just scale it to your own bottle's diameter in [%]. I've printed it 1mm less so it stays in place.
It does not feature a hole for releasing the air inside, so when you want to insert the bottle, you need to put some kind of thin wire between the bottle and the protection, and pull it out afterwards.

Anycubic

All-metal Mega

No

No

0.12

45