My second Lebistro waterer.  The old bottle finally cracked, I know it was atleast 15 years old, and had been unsed by more than a dozen Dobies during that time, so no complaints there.  Bought the 4 gallon size for 2 very large and 2 medium large dogs plus numerous cats.  The bottle is a bit heavy when filled but if you take the time to align the slots and tabs before tilting it spillage is kept to a minimum.  The bottle seems solid when filled, not flimsy as another review indicated. The wide opening is definately superior for cleaning to the narrow opening of my old unit.  Would definately buy again!