Cup to bed? (Cows milk)

Hi everyone, I’m considering taking my son off breast once he turns 1 but I need a good cup that will be efficient in case he wakes up during the night for some milk? Any advice FTM. He breastfeeds to sleep and wakes up during the night to get breast milk it’s not working out anymore I can’t do it I’m tired and so is he! Any advice on how to do this? In need on a good spill proof cup! I just introduced cows milk this week and he loves it 🙏🏼 mind you he never liked formula so I decided to stick it through and breastfeed him till he’s a year and our time is up!!!