Puppy Pad Bedding?

I was getting bedding at wal-mart for my piggie, when I happened to glance over and see 'puppy pads'... they're basically like the pee pads you see in hospitals and whatnot. They're made of a very absorbant material with a lining of.. something.. underneath. I don't /think/ it's plastic. Has anyone ever tried that? They're very inexpensive, and you can even get ones with velcro on the bottom.. so if you stuck pieces of velcro on the bottom of your cage, you could keep the pee pads in place. If no one's tried it or doesn't know it to not be safe, I may just try myself..