Implosion-proof desiccators. They withstand a vacuum of –740 mm/Hg with a loss of no more than 20 mm/Hg in 24 hours. The transparent polycarbonate upper cover is coupled to the lower polypropylene section and tightness is ensured by inserting a neoprene rubber gasket into the corresponding slot. The lid has a polycarbonate valve with a polyethylene valve. The base has an internal basket that serves as a container for desiccant agents (calcium chloride, silica gel, etc.).