Under speakers Vibrapod or Gaïa

ebm5 ,  Yes surely better life span than, a round rubber circle, (mentionned by rodman99999) due to Gaïa very well construction and engineering, it would be last much more longer.  Thank you both of you.

@audiosens-  About three months, far as when I moved my first component and noticed the issue.   The collapses could have actually started in the first three minutes/hours/days/weeks.  They're cheap, but- that's still not much value.     

I suspect the cable company will refund your purchase if you don't think the isoacoustics are worth money. Probably worth a try, I know I really like mine. 

IME, Vibrapods are only effective when used with very light equipment. 

boxer12 , I will try the Gaïa, for my speakers, thank you.