Do you prefer your water bottle to be made of metal, plastic, glass, or something else? Straw or no straw? How big would you want it? Should the bottle taper down in the bottom, or do you think the sided should stay vertical? Are any of you one of the few people who would like that weird rectangular bottle? Or maybe one of those squishy fold up ones for travel? No handle, flip up handle, mug style handle, or little loop?
Note that I am not affiliated with any water bottle company
Mine is a repurposed glass olive oil bottle with a swing top lid.
Il Casolare, for anybody who wants to get in on this, and you need to replace the swing top bit initially for a standard one as the one it comes with is leaky, and then the rubber seals every few months as they get gross eventually.