iantrevor wrote:I'm currently using the kitchen-trash-can method too, but I can't help but feel gross every time I knock out the puck.
Get a can with a lid, and cut the bottom of of a standard 4"x6" (ish, called a 1/9th, or 'a ninth') 4 inch deep hotel pan, or steamtable pan, and cut the bottom off of it. Drill two holes in the side, a bit of 3/8" threaded rod, two of these things*

called weld nuts, nutserts, you can use t-nuts, etc. and put one at either end of the threaded rod.
Get a piece of hose (discussed earlier) to put over it, and cut a hole the size of the pan into the lid of the garbage can. I use a grate to keep the dogs from diving, and have just cut a hole the size of my knockbox into it. I haven't emptied a knockbox in a coupla years there. I'm still too chicken to insert mine into the counter top at my house, but I've still got the same assembly, with the bottom intact, nesting in a stained wooden box.