OWSOO 4 Pieces Universal Kayak Scupper Plugs Drain Holes Stopper Bung (Fit All Major Brands) - Walmart.com
Self draining kayak scupper plugs - YouTube
GanFindX 4 or 6 Pack Form-Fitting Kayak Scupper Plug Kit Fit 1.4-1.8" scuppers High Elasticity Fits Most Drain Holes & EVA Meterial Glitter Black-4 Pack
Sit-on-Top Kayak Scupper Plugs – Why Does Your Kayak Have Holes? - Kayak Scout
Why do kayaks have holes? Do I need scupper plugs? — Kayak Scupper Plugs