When you keep the spore syringe correctly, it can last as much as one year. Spores are living points and storing them improperly can cause the killing of the spores. Thus, the spore syringe should be cooled constantly in between 2degree centigrade and to 8degrees centigrade.Visit: https://www.myco.ca/store/10cc-Empty-Syringe-Leur-lock-Terumo-brand-p272947475