Stainless Steel Boat Cup Holder Insert Fits 20 Oz And 30 Oz Tumblers With Bottom Drain Tube Marine Grade Strength Requires Four And One Eighth Inch Hole Keeps Drinks Secure On Deck Or In The Dock

Marine-Grade Stainless Cup Holder for 20 & 30 oz Tumblers ✔️ Sturdy marine-grade steel, fits 20 & 30 oz tumblers, bottom drain

This stainless steel boat cup holder insert secures drinks on deck or near the dock, keeping beverages upright during chop and movement. It's a practical fit for boats, yachts, and marina setups.

✅ Fits 20 oz and 30 oz tumblers securely
✅ Made from marine-grade stainless steel for corrosion resistance
✅ Includes bottom drain tube to manage overflow
✅ Requires a 4-1/8 inch installation hole
✅ Mate Series design reduces clutter on board

💡 What is a marine-grade cup holder insert used for on boats and docks?

It’s handy for keeping beverages steady in rough water and aboard marina setups.

- handy for 20 oz and 30 oz tumblers on deck - bottom drain tube helps prevent pooling inside the holder - corrosion-resistant marine-grade stainless steel construction - installs in a 4-1/8 inch hole for secure mounting✝️