Originally Posted by daycare:
how do you keep those clean? I find that mold grows up in the straws and i have to toss them out...
How long are you leaving liquid in them?
I've always used cups with flexible straws like that (for my own personal water cup) and have never had one grow mold before.
Mine gets rinsed out at the end of the day and put in the dishwasher for a good wash.