S/O What is "gotta have it in the house" food/drink item?

For me, as crazy as it sounds, it's milk. I'm basically addicted. I will drink it but not use it on cereal whereas my kids and bf are the opposite. They never really liked milk much. I love it and also still have Ovaltine with it sometimes. Someone told me once though that the only one that should have cow's milk are baby cows. I tried Almond Milk once but didn't like it (or maybe it was Soy Milk). I drink 2% but have used 1% some too and grew up on non-fat milk.

For my bf, it's Gatorade.