Sippy for BM?

Izabella22

DS is going to start transitioning to the 1 yr old classroom at daycare next week, a few hours a day. He's supposed to be off bottles by the time he starts F/T on the 4th (ummm...yeah, right), he only gets them at DC and we nurse all other times, but he uses the sippy pretty well at home for water. But so far I haven't found one yet that doesn't leak and b/c pumping is a nightmare for me, I don't want to put BM in the sippy we've got now. Any suggestions?  

Also, does this seem early to anyone else? He won't be 1 until the 10th. I do plan to continue nursing as long as he will go for it, my goal is until 2... I'm worried that going to a sippy of BM is going to screw up nursing too (I am clueless in this dept and never really thought beyond sending bottles and how to transition). I've already expressed my concerns to the director and she has a backup plan (him going to the intermediate classroom) but she wants us to try this first.