Grand idea for you, you can make from each bottle of red milk double, just dilute with equal amount of water
when I was in yeshiva in EY, the yeshiva was floating in debt they hired someone to make `seder`,
1st thing he did was cut on the milk, 'crazy everyone drinks a full cup of milk, even at home you dont do it' so to limit consumption he filled a bucket with half milk and half hot water so it will only be good to add in the coffee
the bucherim complained that the farmer that sells to tnuva mixes half milf and half water, then tnuva does the same, and then yeshiva mixes half water, only to have some in the coffee and then you need to wait a half hour to eat fleishig
eventually he changed 1 bag per table