The 17 Most Misunderstood Facts About coffee maker sliding base
http://andresnqvx645.unblog.fr/2019/06/25/what-would-the-world-look-like-without-coffee-maker-sliding-base/
We love this! It works perfectly under our coffee machine. Bed Bath and Beyond had a similar one, but it did not have a stopper on it so the top level could roll right off of the bottom level. We are very happy