NOTE: This will thread right both coke and pepsi product plastic bottles. This unit has been fully updated by us at Rite Farm Products to thread right on to todays plastic soda bottles. We have even updated the drinker cup side of the drinker as well giving the drinker a larger opening and depth to be useful for a larger variety of birds and pets. Works with any pet bird, quail, pigeon, dove, chicken, hamster, and many other pets and birds. New model is 4 inches long overall x 1.5 inches wide x 1.75 inches on the threaded side high overall. 1.5 inches high on the drinker side with a 1.25 inch wide drinker cup that is 1.375 inches deep.