About the productDescriptionNaturalSlim Double-Walled Glass Cup Set✨ Elevate Your Beverage Experience ✨This 400ml borosilicate glass tumbler, paired with a bamboo lid, is perfect for your NaturalSlim® MagicMag®, Metabolic Matcha®, or any cold or hot drink. Crafted from high-borosilicate glass, it ensures purity and safety with no toxic substances released. 100% lead-free, it withstands temperatures from -4° to 300°.Double-Wall Design·Insulated Glass: The double-walled design keeps drinks hotter or colder than single-walled cups. It's cool to the touch and lightweight.·Ergonomic Handle: The handle makes it easy to transport, offering options for both cold and hot beverages.Bamboo Lid·Durable & Airtight: The matching bamboo lid, with a silicone ring, ensures a hermetic seal, reducing heat loss and preventing spills. Its wide design facilitates easy washing.Perfect GiftThis elegant, transparent glass cup with a matching box makes an ideal gift for family or friends. Enjoy your tea with a comfortable, smooth rim. The insulated glass keeps your tea fresher longer.