So ever since I bought my boat i wondered why rinker didn't put a drain in this storage cubby on my 276. I really can't use it for anything because when it rains heavy the water that collects on the gunwhale eventually leads to it, and it just sits. I always wanted to use it for storing a couple drinks, but once the ice would melt I'd have to soak up the water, and forget that.
Rinker starting putting a drain on them the last year or two, but they just put a line through the floor and into the bilge, I assume. I didn't want that, so I installed a drain and t'd into the existing sink drain line. It worked great and is watertight. I did put a little silicon under the drain too, to make sure nothing gets under the cabinet. If it works well I might even wrap the exterior of the cubby in insulation, to make the ice last longer.