Spock drinks water out of a sippy cup no worries...not sure on the brand was a cheap one from big w.. it has a flexible plastic lip thing. i tried putting ebm in it but she wouldnt drink it she sculls water tho. my mach nurse told me uest that she will be fine without bm/ebm for the period of a shift (8hrs) as long as she drinks regular water and solids. not sure how i feel about that, im more comfortable knowing she is still having regular milk. but dont know if that reassures you or not.