Material: 304 Food-Grade Stainless Steel. Corrosion-Resistant & Heat-Resistant (-20°C to 100°C). Dust-Proof Lid with Silicone Seal, Vacuum-Sealed Piston Design. Capacity Options: Small - 500ml, Medium - 900ml. Piston design allows easy air release with a press and simple lid opening by lifting the piston. Stainless steel body ensures durability and direct food contact safety for long-term use. Transparent lid with silicone seal provides airtight sealing, effectively preventing moisture and leaks to maintain food freshness. Food-grade PP5 lid with transparent valve creates a micro-vacuum to lock in ingredient freshness. Dual-size design accommodates diverse storage needs. Ideal for storing and preserving coffee, tea, flour, sugar, grains, cookies, seeds, herbs, nuts, and pet food. Suitable for kitchens, pantries, households, and any space requiring organized, fresh storage.