Rust-proof and durable high-quality glass cup without bisphenol A, classic narrow design, rust-proof, durable, easy to use, slim body, comfortable to hold, fits most cup holders, easy to clean, safe and reliable. Round cup mouth with insulation structure, smooth and comfortable drinking experience. Excellent insulation performance with stainless steel double-layer vacuum insulation construction. 10-ounce vacuum insulated cup made of stainless steel, maintains hot temperatures for up to 12 hours and cold temperatures for up to 12 hours. Lightweight and sturdy design, easy to carry for travel, outdoor activities, or in the car; suitable for home, office, beach, camping, hiking, picnics, parties, and road trips. Specifications: Capacity: 10 oz Material: 304 stainless steel inner and outer liner Size (approx): Height: 11.1 cm / 4.33 in (without lid) Mouth diameter: 7 cm / 2.75 in Bottom diameter: 5.3 cm / 2.08 in Gross weight: about 265 g Net weight: about 215 g Packing List: Cup x 1 Notes: 1. Avoid impact or dropping to prevent damage and loss of insulation performance. 2. Do not place near heat sources to avoid affecting function. 3. Do not use boiling water for children; use warm water to prevent scalding. 4. Do not place in microwave. 5. Do not add dry ice, carbonated drinks, or other high-pressure liquids; avoid adding salty liquids such as soy sauce or soup to prevent corrosion. 6. After storing perishable beverages like milk, consume promptly and clean immediately to prevent spoilage inside the container.