Unique double-walled vacuum insulation technology with vacuum cap keeps your drinks cold for 9 hours and hot for up to 18 hours.while drinking - Perfect for hiking, camping, sports and everyday useDurable and reliable - Rust and Leak Resistant BPA Free ~ Reusable ~ Eco Friendly!!! Whether you're outside playing sports, at school, or inside at work all day, our sturdy, leak-proof stainless steel bottle will keep your drinks exactly the way you put them in! They are designed to be lightweight, making them perfect for long hikes, long hikes, beach days, hot yoga classes, golf, long loaded commutes, or everyday office use. Suitable for children and adults!Features: - No bump or easy deformation after accidental fall.- Size fits most car cup holders and bicycle bottle holders.- Many colors to choose from.- Dishwasher safe.- Easy to clean, fill and drink from.