Staying hydrated is easy when you've got this travel buddy. Whether you're headed to the gym or a quick jaunt across town, you can easily take your refreshment with you. The 23 oz 18/8 stainless steel double wall vacuum insulation technology will keep cold liquids while hot liquids remain hot for up to 10 hours. The Mouth is small enough to sip from on the go. Double wall vacuum insulation keeps your drink icy cold for up to 10 hours. It's large enough to hold water for 10 hours, yet it fits easily into a pack, side pocket or car cup holder. 18/8 stainless steel keeps your favorite beverage fresh and pure, without any leftover flavors or odors.