I've been using the cheapo Lowe's furniture movers for years with decent success. I finally tried the ones Marco sells with the teflon or whatever on the bottom and they are amazing. I think just as good if not better than the furniture gliders and they don't slide off. I'd like to buy maybe 40 or more of them. $7 isn't terrible for 4, but I'm wondering if there is a bulk option for a similar product anywhere.