- FREEZER, MICROWAVE, AND DISHWASHER SAFE: These airtight containers can withstand temperatures from -40°F (-40°C) to 446°F (230°C), making them suitable for dishwashers, microwaves, and freezers. For best results in the microwave, simply remove the lid or open the air vent valve before heating. - VARIOUS SIZES: Our collapsible containers come in four sizes to fit all your storage needs: Small (350ml / 11oz), Medium (540ml / 18oz), Large (800ml / 27oz), and Extra Large (1200ml / 40oz). They are perfect for storing both hot and cold foods, including liquids and solids. Each lid features a robust valve that securely snaps shut for an airtight seal. The containers collapse to one-third of their size for easy storage in cabinets, drawers, refrigerators, and freezers. - SOFT & SAFE MATERIAL: Constructed from top food-grade silica gel, these containers are non-toxic, tasteless, odorless, and free from BPA. They comply with FDA standards and are easy to clean. The soft, unbreakable material is resistant to damage from high falls, ensuring durability. A high-quality, uncrackable rubber ring lid protects your food from spills. - PRACTICAL FOR EVERYDAY USE: Ideal for picnics, camping trips, RV travel, and taking home leftovers. They fit easily into car compartments, purses, coolers, and kitchen cabinets. Perfect for lunchboxes and office meals. These containers reduce storage space by up to 60% when compared to heavy glass alternatives, while remaining lightweight and portable.