21 oz Standard Mouth Flex Cap Bottle

For shorter runs, day hikes, and gym sessions where a full liter is overkill, this is our go-to bottle for athletes who want cold water without the bulk. TempShield double-wall vacuum insulation keeps drinks cold for 24 hours — no sipping warm water by mile three in August. The flex cap clips to a pack or vest so your hands stay free on the move.

• TempShield double-wall vacuum insulation holds drinks cold 24 hours and hot up to 12 — no condensation on the outside, no warm water mid-run
• 21 oz sits in the sweet spot between too heavy and not enough — enough for shorter runs, day hikes, and gym sessions without dead weight
• 18/8 pro-grade stainless steel won't hold flavors or odors after days of use; powder coat finish keeps your grip solid even with sweaty hands
• Standard mouth opening works with most inline water filters and is wide enough to clean properly after muddy trail days
• Flex cap carry loop doubles as a clip point — attach it to a pack, vest, or carabiner when you need both hands free