Package Type: 30 pieces/box • BPA FREE with double zipper design and widened standing base• Heat Resistance Point and Freeze Point (230 Degrees Fahrenheit to -4 Degrees Fahrenheit) • Bag and printing color are food grade; suitable for food packaging• Sterilised using Gamma Ray Sterilization Technology • Ideal for refrigerator and/or freezer storage • Self standing bottom for easy storage.