I want my boyfriend to store his semen in a way that it can be However, if semen is kept in poor conditions it will grow stinky and will stink up the whole apartment. I need to minimise any such occurrence.

Does anybody know of ways the semen can be stored properly and not stink? We don't want it to smell, and we want to be able to refill multiple containers. What do we use? Can you suggest something that will work for this fetish, please?

Sperm lifespan and preservation is NOT important at all.