Flat bottom, one pint, square, straight sides.

Great feed cup for 1 to 2 average sized American game chickens. Great water cup for one bird in the hottest times of the year or two birds in cooler temperatures. This cup has more straight up and down sides than our #40 cup, so the water does not slosh out as easily when it is full, but it is not good for ice like the #40 cup is. So if you live where it does not freeze much, you would probably like this cup better than the #40. Hangs on wire or other thin material and is 3.5" across the front, 4.5" from front to back and x 2.3" deep and holds 16 ounces of water. Made in the USA.