Breast milk storage

So right now I’m storing baby’s milk in 2.5oz increments because that’s what she takes. Should I store more oz in a bag and separate so I’m not wasting so many bags? Only concern is if I put 5oz in 1 bag(2 bottles) my daycare would have to separate and they appreciate them being ready to go.

Also, do I continue to just give 3 month old 2.5 oz or should I work my way up to 3? She eats every 2 hours. I know the rule of 1-1.25oz/ hr.. but every baby is different.