350/500ML Stainless Steel Coffee Mug Insulated Water Cup Portable Double Wall Vacuum Flask Leak-Proof with Lid Travel Coffee Cup

Double-effect insulation and cooling, relying on vacuum insulation to block heat conduction and radiation, can keep high-temperature drinks warm for 6-12 hours and low-temperature drinks cold for 8-24 hours, suitable for all seasons. Sealed and leak-proof, the cup lid fits tightly with the cup body, making it difficult to spill when inverted or shaken, meeting the needs of commuting and travel. Safe water storage, high-quality materials prevent harmful substance release, smooth inner walls without odor, ensuring healthy drinking water. Functional expansion, some models support simmering, tea filtering, and multiple drinking modes switching, achieving "one cup for multiple uses."