Livingston Cup Holders

This cup holder was designed to clip onto the gunnels of my livingston boat. The opening is 3 in. in diameter and 3.3 in. deep allowing it to fit most drinks and coffee cups. I printed it out of abs but asa or petg would be just fine as well. It should be something decently flexible though as it does have to stretch a bit in order to snap over the side of the boat without breaking. I printed in two pieces to make things easier and attached using four 6x1/2 flat head wood screws. My livingston is a 1999 model 9ft. boat with the flat bottom floors inside. My neighbor has an older 8 ft. model and the gunnels are nowhere close to the same size. They were much smaller and the cup holder didn't fit right. If that is the case with yours, you can either modify this model to fit or use it as inspiration to make one similar.