Oosafe® 50 ml Dish, Thin BottomOosafe 50 ml Dish, Thin Bottom Oosafe high end plasticware is approved by scientists but you dont have to take their word for it. Quality testing of each lot ensures that Oosafe dishes meet a high standard every time. Features Designed for wide range of applications Made of Medical Grade USP VI Raw Materials: Polystyrene, Polypropylene and Polyethylene Surface treated options for a consistent hydrophilic surface Packaged in peel or tear open packaging