Please help!

Diana • Boy Mama🥰💙

My husband and I are going on a day trip next Saturday for Valentine’s Day. We will be gone for about 6-8 hrs. My problem is that we won’t be taking baby with us and I know I probably won’t have enough milk phones for him. So I was wondering what is the best formula I could supplement with if we needed to?? He has started solids/purées too so that’s also an option.