21 oz. double wall 18/8 stainless steel bottle. Screw on, spill-resistant Bamboo/steel lid. Elevate every AM train ride, weekend trail trek, and moving moment with the all-new spill-proof Commuter Cup. Made from insulated stainless steel. Maintains cold beverages for up to 18 hours, hot beverages for up to 5 hours. Measuring 21oz, this custom 21oz stainless steel insulated tumbler. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Tailored branding: Supports logo imprint and design personalization. Product Highlights: BPA-free, leak-proof, travel-friendly.