Hydro Flask Lake Superior 21 Ounce Standard Mouth


Style: 21OSMLS |

Our Price: $31.95

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Hydro Flask Lake Superior 21 Ounce Standard Mouth

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Hydro Flask Lake Superior 21 Ounce Standard Mouth Graphite

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21OSMLS Hydro Flask Lake Superior 21 Ounce Standard Mouth

The 21 oz is ideal for taking on the weekend bike ride or hike to keep your fluids cold. Or take it up the mountain and have coffee, hot cocoa, or soup waiting for you at the end of the day. The standard mouth features a larger opening than their original narrow mouth bottle. It is ideal for coffees, teas, mixing sport drinks, or just for those who need to take in more hydration, more quickly. As with all Hydro Flask bottles, they fit perfectly in most car, bicycle, and stroller cup holders and water bottles cages.

  • Patented Standard Mouth Size
  • Double Wall Vacuum Insulated
  • Keeps Hot 12 Hours
  • Keeps Cold 24 Hours
  • BPA-Free
  • 18/8 Stainless Steel
  • Signature Matte Finish
  • Lifetime Warranty
  • All colors except "stainless" have Lake Superior engraving on side

Product Care

  • Wash your flask with a bottle brush: You can find a perfect bottle brush in the baby section of most grocery stores. Use the bottle brush as frequently as possible.
  • Use white distilled vinegar for cleaning:  You can use household white distilled vinegar to help remove any stains or discoloration on the inside of your flask. We recommend putting half cup of vinegar in your flask, gently swirling the vinegar around to wash any affected areas and let sit for 5 minutes. Rinse thoroughly with warm water and repeat if necessary.
  • Use baking soda for cleaning: For those stubborn spots inside your Hydro Flask, mix 2-3 tablespoons of baking soda with a small amount of warm water to form a scrubbing paste. Dip the bristles of your bottle brush in the paste and work paste into affected area on the inside of your flask. Repeat as necessary until stain disappears.
  • Wash your Hydro Flip Lid and Wide Straw Lid in the dishwasher: The Hydro Flip Lid and Wide Straw Lid are top-rack dishwasher safe. The cap may last longer if it is hand washed, but if it needs to be deep cleaned, the dishwasher is acceptable.
Hydro Flask Lake Superior 21 Ounce Standard Mouth

21OSMLS Hydro Flask Lake Superior 21 Ounce Standard Mouth

The 21 oz is ideal for taking on the weekend bike ride or hike to keep your fluids cold. Or take it up the mountain and have coffee, hot cocoa, or soup waiting for you at the end of the day. The standard mouth features a larger opening than their original narrow mouth bottle. It is ideal for coffees, teas, mixing sport drinks, or just for those who need to take in more hydration, more quickly. As with all Hydro Flask bottles, they fit perfectly in most car, bicycle, and stroller cup holders and water bottles cages.

  • Patented Standard Mouth Size
  • Double Wall Vacuum Insulated
  • Keeps Hot 12 Hours
  • Keeps Cold 24 Hours
  • BPA-Free
  • 18/8 Stainless Steel
  • Signature Matte Finish
  • Lifetime Warranty
  • All colors except "stainless" have Lake Superior engraving on side

Product Care

  • Wash your flask with a bottle brush: You can find a perfect bottle brush in the baby section of most grocery stores. Use the bottle brush as frequently as possible.
  • Use white distilled vinegar for cleaning:  You can use household white distilled vinegar to help remove any stains or discoloration on the inside of your flask. We recommend putting half cup of vinegar in your flask, gently swirling the vinegar around to wash any affected areas and let sit for 5 minutes. Rinse thoroughly with warm water and repeat if necessary.
  • Use baking soda for cleaning: For those stubborn spots inside your Hydro Flask, mix 2-3 tablespoons of baking soda with a small amount of warm water to form a scrubbing paste. Dip the bristles of your bottle brush in the paste and work paste into affected area on the inside of your flask. Repeat as necessary until stain disappears.
  • Wash your Hydro Flip Lid and Wide Straw Lid in the dishwasher: The Hydro Flip Lid and Wide Straw Lid are top-rack dishwasher safe. The cap may last longer if it is hand washed, but if it needs to be deep cleaned, the dishwasher is acceptable.

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