Anchor is Base Camp For Your Beverage The Anchor® system is a durable, high-performance, anti-spill beverage holder that affixes to almost any surface on yachts, leisure craft, commercial boats, truck tailgates, RV countertops, and more. Anchor’s waterproof, magnetic, adhesive-mounted coasters pair with metallic connector discs (for reusable drinkware) or silicone container sleeves (for bottles and cans) to roll with whatever bumps, waves, and other unforeseen turbulence you encounter.