A local bargain store has a few of these for sale, and I'd like to pick one up because 1.) It's thick so it's unlikely to warp (A problem I'm having with my current griddle) 2.) It's flat without a handle so it will store pretty easy. Unfortunately, I'm not sure if I can use it on my stove because it only makes direct contact with the stove around the perimeter. Is it possible to use a skillet like this on a glasstop?