Insulated Soft Flask with Bite Top 18oz

Insulated Soft Flask with Bite Top 18oz

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The perfect companion for any walk or run so you can stay cool and hydrated. This large-capacity 18oz. soft flask fits great in front hydration vest pockets, or as an extra in the back storage or stash pocket. With the bite top, you can make sure that you have control of where your water or liquids go ā€“ straight into your mouth and not dripping out the top. The best big-time insulation for a big-time thirst!

Our timeless bite valve helps liquids from escaping so you can keep yourself hydrated no matter how far you go.

Your 18oz. Soft Flask with Bite top is perfectly compatible with ALL Nathan hydration vests.


  • Insulated properties keep fluids cooler 38% longer than non-insulated soft flasks
  • Bite valve keeps liquid from escaping
  • Works great with ALL NATHANĀ® hydration vests
  • Capacity: 18oz / 532mL


  • Hand Wash Only 
  • Do not place this flask in the dishwasher. Clean with warm soapy water and allow to dry with lid removed