●High-quality food grade 18/304 stainless steel on both inside AND outside walls: Non-leaching & toxin-freeUnique double-walled vacuum insulation technology with vacuum-seal cap keeps your drinks cold for 9hrs and hot for up to 18 hrs.
●Wide drip-free mouth opening for ice cube insertion(mouth:3.6cm) and easy drinking: Perfect for hiking, camping, sports and everyday use.
● Durable & Dependable: Rust-proof and leak-proof.
●They are designed to be lightweight, making them great for long hikes, long trekking, days on the beach, hot yoga class, golf, long load trip or everyday office use. Suitable for Kids and Adults!