Mr.X. Wherever did you get the idea a USED wax ring be employed? I would like to think "Stay Afloat" is using NEW materials in their product and not that which has been salvaged in the re-plumbing of several thousand bathrooms.
Mr. M. Don't be so quick to set aside those wooden cones. Think: Emergency table top Christmas tree (when painted green), an "equalizer" for any pesky crawling insects, acorn/crab cracker and with added screw eyes and glitter glued on How to Decorate with Glitter | Overstock.com
an attractive pair of earrings for the Admiral on that "special" night out.
Set on the floor-an obstacle course for the mice on board.
Empty nesters? Missing the kids? Distribute the cones randomly about the deck at bedtime and hold a life jacket drill with the lights out-that'll bring you back to when the kids were just toddlers (remember Legos at o-dark thirty during flu season?)
So I think the wooden cones would be far more useful aboard simply because of their multipurposed uses.
In an emergency (out of beer) one could grill/bake a chicken
DON'T try this with the wax ring or the canned wax!
All the same the wax stuff, either bottled or draft is a good idea.