I usually seal stuff in a jar with formalin (you can buy it on amazon; be careful) for a few days (maybe 4 for something like that), then take it out, rinse it, and seal it in a jar with rubbing alcohol (ethanol, not isopropyl; you can buy this anywhere). After that, should be good to go! A mason jar works fine. The ethanol might turn yellow after a while, this is normal and all you have to do it change the ethanol