Stanley Master Flask

Stanley Master Flask

Only %1 left
Generous 8-oz. capacity that fits in your pocket.

Allow for an additional 2-3 business days before shipping

Keep plenty of your favorite beverage on hand with the 8-oz. Stanley Master Flask. Constructed of food-grade stainless steel and equipped with a screw-down lid and gasket, it’s made to last a lifetime. Matte black coating is texturized for a sure grip. Customized with limited-edition Filson logo graphics.

William Stanley Jr. forever changed the way drinks were kept hot with his 1913 invention that combined the strength of steel with vacuum insulation. In the Master Series, Stanley ups the ante with 1-mm thick 18/8 stainless steel for the ultimate in rugged durability. This stainless steel alloy traps no flavors, so your beverage will always taste like its maker intended.

  • 8-oz. capacity with a curved shape for easy pocket carry
  • Heavy-duty, food-grade 1mm stainless steel
  • Screw-on lid with gasket and keeper
  • BPA-free and FDA-approved
  • Customized with engraved Filson graphics
Item No.



Stainless Steel


Everyday; Outdoors


3-1/2”W x 1-1/4”D x 5-1/4”


Rinse well after use




8-oz. capacity

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