Reddit reviews Mini Desktop Fridge Cooler Personal Fridge(Black)

This is your solution!

I have one and it does the job. It's tiny and discrete, you can bring it with you if necessary. It's not a true refrigerator, as there is no refrigerant, just a small fan cooling a metal plate. As a result, the metal plate condenses moisture, which is another problem you want to avoid with acid. I found the trick is to leave it on its side and let the water drain out of the fan. However, you should still use some kind of waterproof container to store the actual goods, like a baggie or something. Place it inside another metal box (like an Altoids box) to keep it even cooler since this box is smaller, cools fast because it is made of metal, and surrounds the product tightly.

(And btw it is a complete piece of shit for the actual purpose that it was designed for, which is to cool a single can of soda. But at only $15 it's damn cheap!)