Kayak drain plug (Sun Dolphin, etc) for 11mm drain printed in TPU

My Sun Dolphin kayaks had foam rubber drain plugs that were in bad shape, so I created replacements in Tinkercad. The kayak drain hole is 11mm, and this drain plug is 11.5mm in diameter. Printed in TPU and hollow (three outer walls) so they have a nice flex to fit the drain plug hole while still being easy to remove. Prints in about a half hour. 0.2mm layer, 3 walls, 25% infill Printed with Overture TPU 95, no supports needed, 0.4mm nozzle. 3 walls, 25% gyroid infill