Richell's small portion freezer blocks. 25ml x 4 sets, new. 50ml x 4 sets, tray only. No lids. This is a package of 4 sets, a bargain. The 50ml trays don't have lids, but the trays are new. Please use plastic wrap or something similar as a substitute. I opened it to check the number of pieces. I am also selling used Wakewake trays and baby food items. Material: Polypropylene Microwave defrosting OK Dishwasher safe Boiling/chemical sterilization OK Skater, Nishimatsuya, Akachan Honpo, baby food, make-ahead meals, freezer storage