IVYSUN Marine Rail Cup Holders Pack of 2, Clamp-On 360° Adjustable for 30–40oz Tumblers with Non-Slip Insert

IVYSUN Marine Boat Rail Cup Holder is a two-pack clamp-on cup and utility holder that secures 30–40oz tumblers, bottles, or small gear to bimini rails, grab bars, ladders, or any round/angled rail — no tools or drilling required.

This pair of marine-grade rail cup holders is designed for life on the water: corrosion-resistant materials, a non-slip insert to keep tall tumblers steady, and a 360° adjustable clamp that fits horizontal, vertical, and angled rails. The holders free up deck space and provide stable storage for drinks, phones, keys, or small tackle while you operate pontoons, PWCs, or center consoles.

How does the clamp attach to different rail shapes and sizes?

The IVYSUN clamp uses a 360° adjustable mechanism that locks around round, square, or angled rails without needing tools. A quick-turn knob tightens the clamp and the rubberized contact points prevent marring or slipping on metal or composite rails.

• Adjustable clamp fits most rail diameters and thicknesses.
• Rubberized pads protect rails from scratches and increase grip.
• Tool-free tightening with a single hand for fast repositioning.

Will it keep large tumblers steady in rough water?

Yes — the holder is made for oversized drinkware up to 30–40 ounces and includes a non-slip, shock-absorbing insert that reduces tipping and rattling. The deep cup pocket and snug perimeter support tall, skinny tumblers and wider insulated bottles alike.

• Non-slip insert holds 20–40 oz tumblers and bottles firmly.
• Deep pocket design minimizes splash and movement on chop.
• Durable construction resists UV and saltwater exposure.

Can it serve other uses besides holding beverages?

Absolutely — the extra-wide cavity doubles as temporary storage for phones, wallets, keys, sunglasses, or small fishing tools when not holding a drink. The two-pack expands usable storage positions across your cockpit or rail area for convenience while underway.

• Holds phones, keys, and small tackle securely when empty.
• Two units let you place one near pilot and one near passengers.
• Lightweight and removable for off-season storage or cleaning.

How durable is the holder in saltwater and sun exposure?

Manufactured from marine-grade materials, the IVYSUN holder resists corrosion, fading, and impact, making it suitable for saltwater and freshwater use. The UV-stable finish and sealed fasteners extend service life and reduce maintenance compared with generic holders.

• Corrosion-resistant components for long-term marine use.
• UV-stable materials prevent brittleness and discoloration.
• Easy to rinse and quick to dry between outings.

Who this is for: boat owners who need secure, no-drill storage for large tumblers and small items — ideal for pontoon and center-console operators, PWC and jet-ski riders, or anyone wanting a simple upgrade to deck storage. The two-pack suits couples or solo boaters who want multiple mounting points, and it makes a practical gift for anglers, family boaters, and watersport enthusiasts.