Pebbly Beach Boat Cup Holder Inserts 10-Pack — White Marine-Grade Plastic, Drainable 3.5" ID for Boats RVs Cars

Pebbly Beach 10 PCS boat cup holder inserts are marine-grade replacement drink holders with large drains and a snug fit to keep beverages secure on boats, RVs, cars and outdoor decks.

If your old cup holders are cracked, corroded, or collecting water, these white plastic inserts provide a fast, inexpensive upgrade that resists sun, salt, and moisture. Each insert is molded from corrosion-resistant material designed for marine environments, sized to accept most standard cups, bottles, and cans while allowing rapid drainage to reduce standing water and spills during rough rides.

How do these holders stand up to saltwater and sun exposure?

The inserts use marine-grade plastic formulated to resist corrosion, warping, and UV degradation so they last longer than ordinary cup holders. Their construction aims to minimize material breakdown from prolonged dampness and sunlight.

• Marine-grade, corrosion-resistant plastic tested for multi-year outdoor use
• UV-stable formulation to limit fading and brittleness
• Designed to resist deformation from temperature swings and moisture

Will they fit the cups and bottles I already own?

Each insert offers a 3.5" inner diameter and a 4.1" outer diameter, making it compatible with most standard cups, travel mugs, cans and water bottles. The sizing was chosen to suit common beverage containers without wobble.

• 3.5" inner diameter fits most on-market cups and cans
• 3.4" height supports taller mugs and insulated bottles
• Uniform dimensions across the 10-piece set for consistent fit

How does the drain feature reduce spills and standing water?

• Single large drain for rapid water evacuation
• Prevents pooling that can tilt or float cups in rough conditions
• Easier to clean and dries quickly between uses

How secure are these inserts once installed?

These cup holder inserts are designed to fit tightly into existing mounting openings so they stay seated during navigation or travel over rough roads. The snug support limits horizontal movement and reduces the chance of spills or tipped drinks.

• Precision-molded for a close, stable fit into standard openings
• Firm seating resists loosening from vibration and movement
• Suitable for retrofit replacement in boats, RVs, cars, decks and more

Who is this for? The Pebbly Beach 10 PCS boat cup holder inserts are ideal for boat owners, RV and camper drivers, off-road vehicle enthusiasts, and homeowners who want durable, fast-draining cup holders that stand up to outdoor conditions. Choose this set if you need multiple matching replacements to refresh a cockpit, cabin, or seating area—especially when corrosion, cracks, or water accumulation are a concern. These inserts are a practical, cost-effective solution for anyone wanting a uniform, marine-ready cup holder system without altering existing mount cutouts.