The FotoPro Transformer flexible tripod (released sometime last year), has optional replaceable feet that can be swapped out from standard rubber balls, to suction cups, to magnetic, and also spiked feet. The different options screw in through standard '1/4-20 threaded inserts'. This particular flexible tripod is good for cameras weighing under 3lbs (lightweight cameras), or small accessories like lights and flashes.
FotoPro Transformer tripod already setup with 1/4-20 threaded mounts
Having standard threaded inserts makes it very easy, if you decide to mount something else. You'll start seeing these tripods pop up in various colors with different package options, on both eBay (click here)
FotoPro Flexible Transformer Tripod – via eBay
and also via Amazon (click here).
FotoPro Flexible Tripod Rubber Suction Spiked Feet - via Amazon