This feeder has a heavy-duty suction cup that has a twist-to-lock feature for securing the feeder to any window. The base comes apart, and the feeder detaches from suction cup for easy cleaning. Capacity is 20oz/591ml.
Dimensions: 5.1"L x 3.5"W x 7.8"H (12.9 x 8.9 x 19.8CM)