I'm pretty sure that Alibaba printer above isn't a 3D printer. I'm not sure what it does, but if you look at it, it looks as though it is just a bunch of syringes that come down and drop some sort of liquid out of it.

The description reads:
LX-E02 semi automatic bidirectional liquid pvc production machine can be applied to various kinds of pvc product making according to the size of product,like pvc label, pvc brand,pvc keychain,pvc accessories,mouse pad photo frame,anti-slip mat, car mat, and more.
Your best bet would be to find a material that is like Silicon. I don't think there are any printers out there right not that print in Silicon.