From out on the trail to the office, this Hydro Flask bottle makes hydrating easy. TempShield insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours. No Sweat Design - Prevents condensation and the need for a coaster. Fits in most car, bike, and stroller cup holders. Food-grade 18/8 Stainless Steel (BPA free), resistant to odors and bacteria. Standard-mouth opening.