Hario's 350 ml Square Glass Container is perfect for storing left overs, or taking your food on the go as a bento box. The white plastic lid has a silicone ring for an airtight seal to keep food fresh. This glass container can go straight from the microwave to the table. Its refined glassware make it look nice to serve with style unlike the usual tupperwares. Recommend purchasing several of these 500 ml Square Glass Containers as well as the other containers from Hario to build a complete set. Microwave safe. Made in Japan.