Lunch Cubes high Borosilicate glass food storage containers are the high-quality, leak-proof alternative to plastic containers and baggies. Made of high Borosilicate glass, they are durable and reusable for an eco-friendly solution to wasteful disposables. The airtight, snap-on lids create a completely leak-proof seal, so you can pack them in your lunch bag, purse, backpack, diaper bag and more without worry about spills, leaks or mess. The size is perfect for lunches, snacks, baby food portions, on the go ease and at-home storage.