I think the hats is a little over the top. Although there may have been a reason like head lice or something. In that instance I would rather wash a hat everyday than my child get head lice.
The drink bottle, I would think you would want to wash it everyday! They get gross so quick. The carers don't only have to wash your child's drink bottle, but the rest of the children's as well. I wash my children's bottles out everyday, although they are now in school.
The carers aren't being paid extra when your fees are raised. I would have thought you would rather the cares supervising your child and interacting than spending time washing hats and bottles.