Selected 304 stainless steel liner, long-lasting heat preservation, and vacuum insulation material can keep the drink at 24 hours at low temperature or 12 hours at high temperature. No burr rounded cup mouth, smooth water, even without spillage. Spray paint process, strong colour adhesion, not easy to drop paint, non-stick fingerprints hand sweat, scratch-resistant. A non-slip cup bottom increases friction, and a non-slip is more stable. Fresh colour scheme, simple and durable, with a variety of colours to choose from.