Double-wall vacuum insulation: Advanced double-wall vacuum technology ensures optimal temperature retention. Your cold drinks stay cool all day (up to 24 hours), while hot drinks maintain their perfect temperature for several hours (up to 12 hours). Perfect for iced water, coffee, tea, or milkshakes. Premium material: Made from food-grade 304 stainless steel, odorless and corrosion-resistant. A sweat-free, non-slip coating provides a comfortable grip. 100% BPA-free, suitable for daily use by the whole family. Leak-proof and user-friendly: The special lid allows for easy one-handed operation and ensures a complete seal. The wide opening makes refilling and cleaning simple and convenient. Perfect for carrying in a bag without the risk of leakage. Stylish design and versatility: The modern black design features a practical handle that combines functionality and style.