How long can oatly be left out of the fridge?

Hi Oatly team! First off, can’t express how much I appreciate having a product like Oatly. My son has CMPA and is about to be 1. Last month he stopped taking the hypoallergenic formula and it became so stressful trying to get him to take a bottle. So we tried Oatly and he loves it! Drinks it by the gallon. As a mom of two under 5, I’ll take any help I can get and not having to stress out about whether or not my baby is drinking enough has brought me so much relief. So, again, thank you. 

But I digress lol! My question is, how long can oatly be left out of the fridge before going bad? My son still wakes for night feedings and has about 2 bottles throughout the night and it’s a bit of a challenge making my way down to the kitchen half asleep to make a bottle lol. Can I make the bottles around 11pm then keep them out for his 1am and 3am feedings? Or should I invest in a mini fridge? Lol cause I will if I have to.