The Keeper is the first cup I heard about, after Insteading for 10 years. I'm allergic to latex, or Keeper would be in my newfound "collection" of cups. I accidentally got their silicone version off Ebay, after already having purchased a Diva for myself and daughter. Silicone Keeper is being lent to sister in law. Mooncup from UK is on it's way to me, but probably won't be here in time for my cycle due on Sunday or Monday, then I leave out of state on Tuesday (w/ Diva to see me through). I can't wait to try Moon, and if SIL or niece can't use Silicone Keeper, I'm keeping it for just because.