Narrow design is easy to hold and fits into most cupholders TempShield™ insulation keeps cold drinks cold for up to 24 hours and hot drinks hot for up to 6 hours Insulated press-in lid features Honeycomb Insulation™ for additional temperature control and easy transport Durable 18/8 Pro-Grade Stainless Steel construction BPA-Free and Phthalate-Free Lifetime Warranty