Recently purchased a set of 6 pudding jars. I washed them thoroughly. They're glass with plastic lids. Because they have airtight lids, they can be used in the kitchen for various purposes, such as storing sugar, sesame seeds, or leftover sauces. Other uses include storing medicine, buttons, or dog treats. Shipping via Yu-packet Plus. ¥520 (¥455 + box fee ¥65)