Please Note: This Gasket / O-Ring / Seal Set Fits Only Travel Tumblers / Mugs With The Narrow Body And Wide Top Model (Sipp And Comparable Mugs). Will Not Fit The Wide Body And Narrow Top Model (Stainless King Models). Please View All Pictures Prior To Purchg | | Perfect Replacements: Perfect Replacement Gaskets / O-Rings / Seals For 16 Ounce / Oz Sipp (And Comparable Model) Vacuum Insulated Stainless Steel Travel Tumblers And Travel Mugs. These Do Not Fit Any Other Sizes Or Models | | Replace Your Lost Or Loose Gasket: Gaskets Get Lost Periodi