Double wall vacuum insulation with copper plated inner wall provides extreme temperature retention, keeping drinks hot or cold all day Spill-resistant lid comes standard with slide closure. Competitor lids come standard with an always-open lid Features an ergonomically designed body that sits comfortably in the hand and fits in up to 99% of all car and truck cup holders Food grade 18/8 stainless steel construction provides superior insulation Includes pelican's legendary lifetime guarantee - you break it, we replace it...Forever