High borosilicate glass food containers are convenient, you can pack them in your lunch bag, purse, backpack and more.The containers are durable and reusable for an eco-friendly solution to wasteful disposables. Product features: 1.Good heat-resistance:baking temperature of glass from -40, 400 extremely up to 500.The thermal shock can be 120 2.The containers can be used in microwave, fridge, oven, dish-washing machine. 3.Non-porous glass surface won't absorb odors or stains. 4.High transparency brings good view of inside.