My baby needs milk every 3 hours at night. What is the best way to store milk in room temperature?

Direct latching would be the best :) Instant milk plus you wouldn't have to prepare any bottles or clean up afterwards. For me, as my baby is formula-fed, what I did was to have warm water in a flask and 3 separate canister of formula milk and 3 clean bottles and placed them on my side table next to my bed. If my baby wakes up, it only takes me less than 5 mins to make it ^^