Throw away those old, gunked up rubber rings on your stainless steel tumbler and replace it with a new seal! These o-ring fit the 12 ounce Corkcicle Wine Tumblers. 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 Yeti, Thermos, Big Bubba, Contigo, Kleen Kanteen, or Hydroflask.