Milk is a perfect breeding ground for all sorts of nasty pathogens - it's a nutrient ffs. Better invest ~160€ [1] into a dedicated fridge than have half the office get the shits because someone forgot to put the milk back into the fridge over night. I've seen that happen, and if it's more serious it may actually lead to an OSHA/food safety inspection and serious fines.
[1] https://www.amazon.de/milchk%C3%BChlschrank/s?k=milchk%C3%BC...