
Stainless Steel Construction Vacuum Tumbler with Double Walled. Double Wall Vacuum Insulation: Superior heat and cold retention with copper or silver plating to reduce radiation heat loss. 100% BPA Free Material: Made from medical grade SUS304 stainless steel, safe and durable for health care. Leak Proof Design: Advanced lid technology ensures liquids are sealed inside, preventing spills. Customizable Options: Supports full customization including color, logo, and design based on customer requirements. Easy to Clean Finish: Powder coating and stain-resistant finish allow for whole product washing and easy maintenance. Wide Application Scope: Suitable for children, adults, outdoor sports, office use, and travel scenarios. International Certifications: Holds FDA, LFGB, BSCI, ISO9001, and SGS certifications for quality and safety assurance. Professional Manufacturer: Established in 2019 with over 20 invention patents and advanced production facilities.