Food Storage Containers Premium Box Set (4 Different Sizes) - Collapsible, Foldable, Children and Baby Safe. Super Versatile - Food Prep / Storage, Lunch / Bento Box, Freezing, Microwave CONTENTS : 4 piece folding food storage containers with pressure valve lids - 350ml, 550ml, 800ml and 1100ml (see Product Description for Sizes) 100% FOOD GRADE SILICONE (can be used for storing baby food) : Non-toxic, tasteless, no odour, BPA free, easy to clean, waterproof VERSATILE : Safe for dishwasher, microwave, oven and freezer. Temperature -40 to 230 Degrees Celcius FEATURES: Compact foldable collapsible for easy storage when not in use, air tight seal with lid, lids have one-way pressure release value SATISFACTION GUARANTEED : Or your money back! No quibble customer service for your peace of mind and assurance!