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
Well you gotta occasionally wash it
I was young back then ! I wash my reusable bottles with diluted bleach now but I think it can damage the plastic in water bottles.
I just use a drop of dish soap, swirl it around real good. I think it’s the threading on the cap and lip of the bottle where the most yucky can accumulate. Just get in there with a sponge