Welcome to our store! Thermal Insulation: This 12oz Eggshell Cup features a copper plated inner liner that is stretched and electrolyzed for excellent thermal insulation. Complete Kit: The set includes a cup, straw, straw brush, cup cover, and cup brush, providing a complete use and cleaning set for your convenience. Portable: Exquisitely designed, compact, and lightweight, the cute vacuum eggshell cup is easy to carry around without any burden. Widely Applicable: Suitable for various settings such as home, university, school, office, and travel, this portable thermal cup has a wide range of applications. Food Grade Material: Crafted from food grade stainless steel, this cup is sturdy, wear-resistant, rust-proof, and safe for use. Specifications: - Item Type: 12oz Eggshell Cup - Material: 304 Stainless Steel - Gross Weight: 255g / 9.0oz - Product Capacity: 350ml - Product Size: Approx. 6 x 8.2 x 11.8cm / 2.4 x 3.2 x 4.6in - Purpose: 5 hours for thermal insulation, 9 hours for cold insulation Package Includes: - 1 x Cup - 1 x Straw - 1 x Straw Brush - 1 x Cup Cover - 1 x Cup Brush 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.