Durable Borosilicate Glass – Crafted from extra-tough borosilicate glass, these 640ml containers are perfect for use in the freezer, fridge, microwave, and oven, allowing for easy storage, cooking, and dining with no extra pots needed. Airtight and Leak-Proof – The sturdy plastic lids with silicone seals and four heavy-duty clips work together to lock in freshness and flavor, preventing leaks and spills, keeping your meals safe and fresh wherever you store them. Perfect for Medium-Sized Portions – With a 640ml capacity, these containers are ideal for storing medium-sized portions, salads, snacks, and leftovers. Their compact yet spacious design makes them perfect for meal prepping and easy storage. Eco-Friendly and Cost-Effective – By eliminating the need for disposable plastic, these containers promote a sustainable lifestyle, reducing both food and plastic waste. They're a reusable and cost-effective choice for your kitchen. Convenient Dimensions – These 640ml containers measure 17cm in width, 12.5cm in depth, and 5.5cm in height, making them the perfect size for storing and transporting meals, whether for lunch or leftovers, on the go.