- FREEZER, MICROWAVE, AND DISHWASHER SAFE: Our airtight containers are designed to withstand temperatures from -40°F (-40°C) to 446°F (230°C). They are perfectly safe for use in dishwashers, microwaves, and freezers. For best microwave results, simply remove the lid or open the air vent valve before heating. - VARIED SIZES FOR ALL NEEDS: These collapsible containers come in four convenient sizes: Small (350ml / 11oz), Medium (540ml / 18oz), Large (800ml / 27oz), and Extra Large (1200ml / 40oz). They are ideal for storing both hot and cold foods, including liquids and solids. The durable lid features a valve that snaps securely to maintain an airtight seal. When not in use, the containers collapse to one-third of their original size for efficient storage in cabinets, drawers, refrigerators, and freezers. - SAFE AND DURABLE MATERIAL: Crafted from food-grade silicone, our containers are non-toxic, tasteless, odorless, and BPA-free. They meet FDA compliance standards and are easy to clean. The soft, unbreakable material is resistant to high impacts, ensuring long-lasting durability. The uncrackable sealing rubber ring lid prevents spills, keeping your food secure. - PRACTICAL FOR DAILY USE: These containers are perfect for everyday applications such as picnics, camping trips, RV travel, and storing leftovers. They fit easily in car compartments, purses, coolers, and kitchen cabinets. Ideal for lunchboxes and office meals, they help reduce storage space by up to 60% compared to traditional glass containers, all while being lightweight and portable.