【Premium 304 Stainless Steel】Crafted from high-quality food-grade 304 stainless steel, our sandwich containers are exceptionally sturdy, rust-resistant, and built to last. Unlike plastic, the metal surface won't absorb lingering odours or stubborn stains, ensuring your food stays fresh and preserves its authentic flavour 【Double Leak-Proof & Air Valve Design】Engineered with a secure silicone gasket and an air valve, our snack boxes offer an airtight, leak-proof seal. Simply press the valve to lock in freshness and prevent messy sauce leaks. When you're ready to eat, gently pull the valve to release the pressure for effortless opening. Ideal for commuting, picnics, and travel! 【600ml Perfect Portion Size】Featuring a generous 600ml (20.29oz) capacity, it’s the ideal size for hearty sandwiches, fresh fruits, salads, or daily snacks. Dimensions: Top 13cm (5.12"), Bottom 11cm (4.33"), Height 6cm (2.36"). It perfectly balances a compact shape for your lunch bag with enough space to keep you fully fuelled 【Freezer & Dishwasher Safe】Designed for everyday convenience, this food storage box easily withstands freezing temperatures to keep your meal-prep fresh. Cleanup is also a breeze as it is fully dishwasher safe. (Please Note: As it is made of solid stainless steel, this container is strictly NOT microwave safe) 【Stackable & Space-Saving】The stackable design allows you to neatly organize multiple containers, maximizing valuable space in your kitchen cupboards, fridge, or backpack. Whether for daily meal prep, office lunches, school snacks, or outdoor adventures, this versatile box is your perfect companion