Hydro Flask 21 oz Standard Flex Straw Cap (Sandpiper) keeps you hydrated in style with its soft Sandpiper finish and everyday performance you can rely on. This insulated bottle pairs rugged durability with thoughtful design, perfect for commuting, workouts, hikes or daily life around town.

• Material composition: 18/8 pro‑grade stainless steel with TempShield® double‑wall vacuum insulation keeps drinks cold up to 24 hours and hot up to 12 hours when used without the straw cap 
  
• Leak‑proof Flex Straw Cap with flexible carry loop makes one‑handed sipping easy and convenient 
  
• Slim, cup‑holder‑friendly shape with durable powder‑coat finish for everyday use and easy cleaning (dishwasher safe)