Fabulous idea

I stumbled across these whilst just browsing for dog toys... thinking they looked a great idea I purchased them and was pleasantly surprised when they arrived... they were bigger than I expected and clearly good quality.. for the price I had expected flimsy cheap plastic !! Wrong!! 
my hyperactive dog has been completely focused on retrieving his treat from this and trust me when I say I had him engrossed for ages ha ha ... suctioned to the floor it made it easier for him but he still had to work hard to accomplish his mission... love em!!