Alternatives to Stillpoints

My 2" by 2" gizmos box of 48 will arrive tomorrow since stevecham turned me on to them. Since my current favorite footer is $1.50 Butyl rubber chemical bottle stopper size 10... I have good hopes for the  gizmos I am soon to own. Even if not, the gizmos can free up twenty of my favorite bottle stoppers now in use under a big air cleaner running 24/7 in the bathroom which vibrates too much. So for $30 with shipping I free up $30 worth of rubber stoppers. AND still have probably 30 extra new gizmos to play with.         I already mentioned as soon as the company discovers AUDIOPHILES are buying them, they will raise the price to $50 apiece .. Then the audiophiles will really flock to buy them exclaiming...  "What a bargain".     
(sarcasm son sarcasm...)

The little blue foam center with tread top and bottom. Useless for audio. Way way way to stiff. maybe drilling a gazillion holes in the foam might get them to flex some. They clearly are designed for multi- hundreds of pound weights. The vibrating air cleaner I placed a dozen under?  The wood below is vibrating just as much. So total fail. My butyl rubber bottle stoppers are way better.