For the past two weeks LO has been using a weighted straw Munchkin at school for water. He successfully drank formula out of the same kind of cup at home last night. We only have those two straw kinds. I'm ready to put the bottles completely away.

I did a Google search that in a few months it will be time to transition him again to a cup with an opening (a trainer?). Same article says by 2 he should be using that, so that's a 9 month transition!?

How many straw sippy cups do you have/ need?
How many trainer cups do you have/ need?

I can bring all the cups home each night and wash them, but I doubt the milk sippy cups are getting more than a vigorous rinse at daycare.