No matter which baby formula you've purchased, you should always store both opened and unopened containers in a clean, cool, and dry place, such as a pantry, drawer, or cabinet - try to keep them away from direct sunlight. Do not store containers of baby formula powder in the fridge, as the humidity can cause the baby formula to form clumps. Also, note that powdered baby formula is not suitable for freezing.
Do not expose baby formula containers to extreme heat or extreme cold. As a general rule, we recommend storing baby milk containers at temperatures between 13 and 24ºC. They should definitely not be exposed to temperatures above 35ºC or below 0ºC.