Material Safety BPA free, containers are made of 100% food grade PP and silicone: non-toxic, environmentally friendly. Super smooth surface on the inside to avoid grease and very easy to clean. Includes four medium containers: 13.5 cm x 10 cm x 6.5 cm - 350 ml; 16.5 cm x 11 cm x 6.5 cm - 500 ml; 18.5 cm x 12 cm x 7 cm - 800 ml; 21.5 cm x 13.5 cm x 7.5 cm - 120 cm - 12000 ml. Ideal Food StoragePerfect for storing food indoors, outdoor activities, such as work, camping, hiking, travelling and more. Easy to assemble and carry, it is the best lunch partner for children, but also ideal for adults to develop healthy eating habits and the ideal choice as a gift. Foldable Design Allows easy storage, folds down to 1/3 of its original size for easy, compact storage, saving more than 60% of space. Safe material: made of 100% BPA-free food grade silicone, non-toxic, tasteless. Can be used at temperatures from -40C (-40C ~ 230C). Microwave and refrigerator safe. Note: The oven is not available. Product Colour:Grn Specifications: Material: food grade silicone, FDA certification: can be used in temperature -40 C ~ 230 C and heating time no more than 5 minutes. Fold thickness: approx. 3 cm. Size: 350 ml, 540 ml, 800 ml and 1200 ml. Size and dimensions are: Container (350ml): 13.5cm x 10cm x 3cm (folded) and 13.5cm x 10cm x 6.5cm (extended) Container (500ml): 16.5cm x 11cm x 3cm (folded) and 16.5cm x 11cm x 6.5cm (extended) Container (800ml): 19cm x 12.5cm x 3.5cm (folded) and 19cm x 12cm x 7cm (extended) Container (1200ml): 21.5cm x 14cm x 3.5cm (folded) and 21.5cm x 14cm x 8cm (expanded) Package includes: 4 x Silicone Collapsible Food Storage Containers