A&M Sugarworks Store › 38 mm Flip Cap Image 1 of 5 Image 2 of 5 Image 3 of 5 Image 4 of 5 Image 5 of 5 38 mm Flip Cap $0.25 Size 38 mm flip top cap will fit on Pint, or Quart Decanter jars. Also Fits on the 8oz Stout jar. Comes in White, Or Black. Color: White Black Quantity: Add To Cart Added! Size 38 mm flip top cap will fit on Pint, or Quart Decanter jars. Also Fits on the 8oz Stout jar. Comes in White, Or Black.