Made of stainless steel, corrosion-resistant and acid-resistant, so that every sip is reassuring. Rounded mouth with a fine polished finish. Bamboo bottom, reinforced design, more stable. Various combinations for easy disassembly and cleaning.Great for promotional giveaways, each cup can be customized with your logo or name for maximum brand awareness! Measuring 18oz, this custom 18oz stainless steel insulated tumbler with bamboo bottom. 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.