Customized Tea Thermos Vacuum Flask – Premium Insulated Color-Changing Cup
High-grade 18/8 stainless steel inner wall, polished for rust-free durability and safe liquid storage. Double-wall vacuum insulation maintains hot/cold temps for 12+ hours. Smart heat-sensitive coating changes color when filled, adding interactive fun. Precision laser engraving allows custom logos/text for corporate gifts or personal branding. Leak-proof swing lid with silicone seal, one-handed operation ideal for commuting, hiking, or office use. Wide mouth fits ice cubes and tea infusers. Wholesale-friendly bulk pricing without minimum order limits. Direct factory supply ensures unbeatable global rates. Ships worldwide with flexible OEM/ODM options.