Water Bottle Lid Keeper

My waterbottle has a little handle on the lid, but no way to keep the lid with the bottle, so if it's open, I have to hold the lid with my other hand. This is a little sleeve to go around the neck of the bottle, then I'll use a bit of cord to tie the lid to the slit in the sleeve so I can drop the lid and it'll stay with the bottle.

Printed with flexible filament--the model undersizes the (slightly sloped) neck of the bottle for a friction fit.