If it's a compound I'm actively using, yes. Right now I've only got some preworkout compounds in there as I've not had issues with anything else crashing, so it's got TNE, Superdrol, and Methyltrienolone. Storing your normal compounds in there that don't crash is also a good idea as the oil will flow much faster, and it makes injections quick and easy. The increased temperature isn't going to degrade anything faster than I'll use it, so I'm not concerned about that. I wouldn't keep anything in there for several months, but a few weeks or a month isn't going to be a problem at all.