316 Stainless Steel Double-Wall Vacuum Insulated Thermos Tumbler

**EN:** Premium 316 Stainless Steel Vacuum Insulated Thermos Cup engineered for modern lifestyles and tough outdoor environments. Constructed from food-grade 316 stainless steel — superior to the standard 304 grade — this tumbler offers exceptional corrosion resistance and is fully safe for acidic beverages, coffee, tea, and long-term daily use. The advanced double-wall vacuum insulation technology keeps drinks hot for up to 12 hours and cold for up to 24 hours, making it perfect for outdoor adventures, long-distance driving, commuting, and office hydration. Its thickened wall construction delivers enhanced durability while preventing external condensation. The leak-proof sealed lid makes it car-friendly and travel-ready. Designed as a unisex style, this portable tumbler fits standard car cup holders and is ideal for hiking, camping, road travel, and daily hydration needs. The customizable surface supports logo printing, laser engraving, and personalized colors — an excellent choice for corporate gifts, promotional merchandise, and bulk B2B wholesale orders. Dropshipping, OEM, and ODM services are fully supported. **中文:** 316不锈钢真空保温杯，采用食品级316材质，比普通304更耐腐蚀、更安全耐用。双层真空加厚设计，保温保冷效果持久，热水12小时、冷饮24小时。男女通用便携款式，车载杯托兼容，防漏密封盖设计，户外通勤皆宜。支持LOGO定制与批量采购，是企业礼品、跨境电商和促销赠品的理想选择。