Pound-shops?
Supermarket?
Can she go to sleep without it? (Can she actually drink from a cup?) Only that I tried this idea (with faairies and a v entusiastic dd, only to have her distraught because she didn't know how to go to sleep. cue feeling-like-a-crap-mummy and some wildly imaginative backtracking... see other thread)
But hopefully all will be well! we transitioned dd a couple of months ago to cup (friend cme over who used her bottle so she used the NUK cup - that i had bought for her baby brother) and it was no problem at allm .