Portable Button Fastener Silicone Heat Insulation Storage Sleeve. Food-Grade Silicone Material: Crafted from premium, food-grade silicone ensuring safety for all food storage needs. 100% Leak-Proof Seal: Dual-locking mechanism creates an airtight and waterproof seal to prevent messy spills. Space-Saving Design: Foldable and squeezable flat, saving up to 80% of cabinet or freezer space when empty. Dishwasher Safe: Easy to clean and resistant to stains and odors, suitable for dishwasher use. Extreme Temperature Resistance: Built to withstand temperatures from freezer to microwave and safe for sous vide cooking. Reusable and Sustainable: Designed for thousands of reuses, offering a durable alternative to single-use plastic bags. Customizable OEM/ODM Service: Logo and design customization available based on customer design drafts. Fun Adorable Shapes: Features unique designs like corn cobs and dumplings to make food storage fun for kids.