12 imagesHydro Flask Standard Mouth Flex Cap, Pineapple, 21 oz, S21SX750
Hydro Flask Standard Mouth Flex Cap, Pineapple, 21 oz, S21SX750
Hydro Flask Standard Mouth Flex Cap, Pineapple, 21 oz, S21SX750
Hydro Flask Standard Mouth Flex Cap, Alpine, 21 oz, S21SX433
Hydro Flask Standard Mouth Flex Cap, Carnation, 21 oz, S21SX622
Hydro Flask 21 oz Standard Mouth Flex Cap, Rain, S21SX417
Hydro Flask 21 oz Standard Mouth Flex Cap, Snapper, S21SX604
Hydro Flask 21 oz Standard Mouth Flex Cap, Starfish, S21SX827
Hydro Flask 21 oz Standard Mouth Flex Cap, Seagrass, S21SX321
Hydro Flask 21 oz Standard Mouth Flex Cap, Laguna, S21SX454
Hydro Flask Standard Mouth Flex Cap, Alpine, 21 oz, S21SX433
Hydro Flask 21 oz Standard Mouth Flex Cap, Snapper, S21SX604
Hydro Flask 21 oz Standard Mouth Flex Cap, Snapper, S21SX604
Hydro Flask 21 oz Standard Mouth Flex Cap, Snapper, S21SX604

Product Discontinued by Manufacturer

Hydro Flask 21 oz Standard Mouth Flex Cap has been discontinued by Hydro Flask and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Camp & Hike, Camp Kitchen, Camp Hydration, Water Bottles & Carriers, Water Bottle Accessories yourself to try and find the perfect replacement for you!

Product Info for Hydro Flask 21 oz Standard Mouth Flex Cap

Moves with you. Strong yet flexible, our Standard Mouth Flex Cap is the perfect companion for spontaneous campouts, epic road trips, and everything in between. Made with stainless steel pivots and an easy-to-carry strap, this cap has Honeycomb Insulation to help keep your drinks cold for up to 24 hours or hot up to 12. Pair it with any of our Standard Mouth bottles.image

Features of Hydro Flask Standard Mouth Flex Cap:

  • Leak-proof design
  • Vented cap allows hot vapors to escape
  • Made of durable polypropylene PP#5
  • BPA-free
  • Compatible with all standard mouth bottles
  • Lifetime Warranty

Package Contents:

  • Hydro Flask 21 oz Standard Mouth Flex Cap
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Hydro Flask 21 oz Standard Mouth Flex Cap Unavailable & Discontinued Models

List of Unorderable Models

  • Hydro Flask Standard Mouth Flex Cap, Pineapple, 21 oz, S21SX750 , MPN: S21SX750 , UPC: 810028842397 , Code: HDF-WBA-HYF003621-S21SX750
  • Hydro Flask Standard Mouth Flex Cap, Carnation, 21 oz, S21SX622 , MPN: S21SX622 , UPC: 810028842373 , Code: HDF-WBA-HYF003621-S21SX622
  • Hydro Flask 21 oz Standard Mouth Flex Cap, Seagrass, S21SX321 , MPN: S21SX321 , UPC: 810070081812 , Code: HDF-WBA-HYF003621-S21SX321
  • Hydro Flask 21 oz Standard Mouth Flex Cap, Laguna, S21SX454 , MPN: S21SX454 , UPC: 810070081829 , Code: HDF-WBA-HYF003621-S21SX454
  • Hydro Flask Standard Mouth Flex Cap, Alpine, 21 oz, S21SX433 , MPN: S21SX433 , UPC: 810028842380 , Code: HDF-WBA-HYF003621-S21SX433
  • Hydro Flask 21 oz Standard Mouth Flex Cap, Snapper, S21SX604 , MPN: S21SX604 , UPC: 810070081836 , Code: HDF-WBA-HYF003621-S21SX604
  • Hydro Flask 21 oz Standard Mouth Flex Cap, Starfish, S21SX827 , MPN: S21SX827 , UPC: 810070081843 , Code: HDF-WBA-HYF003621-S21SX827
  • Hydro Flask 21 oz Standard Mouth Flex Cap, Rain, S21SX417 , MPN: S21SX417 , UPC: 810028842403 , Code: HDF-WBA-HYF003621-S21SX417
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