Enjoy delicious meals on the go with the Martha Stewart 21oz Glass Storage Container with Lid. Made from durable, borosilicate glass, this container includes a silicone sleeve over the glass to protect from chipping and breakage and a snap on leakproof lid. Pack a complete meal for work, store leftovers, or keep snacks fresh in this refrigerator and microwave safe storage container. Dishwasher and microwave safe. Do not microwave with the lid.