Premium 260ml stainless steel thermos cup featuring double-wall vacuum insulation for 12-hour temperature retention. High-grade 18/8 stainless steel interior resists rust and odors while maintaining liquid purity. Integrated removable tea filter and ergonomic handle for convenient steeping and portability. Mirror-polished exterior with scratch-resistant coating for lasting shine. Ideal for office commuting, outdoor adventures, or as an elegant gift. Commercial-grade construction withstands daily use in hospitality or corporate bulk purchasing. Custom logo engraving available for wholesale orders. Superior heat/cold retention outperforms standard tumblers with 30% thicker insulation walls. BPA-free materials meet FDA and EU food safety standards. Leak-proof screw lid with silicone gasket ensures 360° spill protection.