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Replace your old, dirty, gunked up rubber rings on your stainless steel tumbler and replace it with a new seal! The 20oz o-ring fits most major brands of 10, 12, 16, and 20 ounce tumblers such as Yeti, RTIC, Rooster6, Ozark Trail, and SIC. The 30oz o-ring fits most major brands of 30 ounce tumblers such as Yeti, RTIC, Atlin, Ozark Trail, and SIC. Simply pull off the old ring then stretch the new ring in its place and let it seat in the groove for a perfect seal. Each package contains two new seals. Lid sold separately. Our replacement seals will fit most major brands of stainless steel tumblers like the ones pictured These seals do not fit brands such as Thermos, Big Bubba, Contigo, Kleen Kanteen, or Hydroflask.