Here's the thing, Doug. If the cans didn't work, I could always eat the contents. For $3 per footer, you can't go wrong. But I confess I in a sense spent a little more than $3; I had some truly "audiophile" Black Diamond Racing carbon fiber tiptoes lying around, so using double-sided tape, I fixed a tiptoe to the bottom of each can. Thus the weight is borne by the tiptoe and it transmits force to the bottom of the can but not the rigid edges of the can. The thin slightly flexible tin that comprises the top and bottom of a can provides a touch of springiness with a resonant frequency probably close to 2-3Hz, certainly less than 5Hz. And energy imparted to the bottom of the can is dissipated in the contents of the can, which being heterogenous and "chaotic" will easily dissipate it. I should probably market this, only instead of calling it "Mandarin orange slices in water with a tiptoe glued to the bottom", I would call it.... well, for that I need a PR guy.