【Rust-proof and Durable】High-quality glass cup without bisphenol A, classic narrow cup, rust-proof, durable, easy to use, slim body, easy to grasp and place cup holder, easy to clean, safe and reliable. 【Round Cup Mouth】Insulation cup structure, round cup mouth, comfortable to drink. 【Excellent Insulation Performance】Stainless steel double-layer vacuum insulation cup structure, excellent insulation performance. 【Vacuum Insulation】10 ounces, stainless steel double-layer, vacuum insulation technology, can maintain hot water temperature for 12 hours, cold drinks for 12 hours. This unique glass is a companion for babies. 【Wide Application】Light and sturdy, easy to carry anywhere, vacation or in the car, suitable for home, beach, lake, office, party, RV trip, cabin trip, camping, hiking, picnic. Capacity: 10oz