Ya, I knew what you meant [waffle]. I use it in the shop to hold my material from sliding, like when I'm sanding. It's a 'foam' type material, not sure what it would do with heat, plus it's thicker, and may be a bit wobbly with some containers.
This silicone liner is thin, and stays in place [almost] like it had adhesive backing. I use it all over the house for various things, even as a jar lid gripper to open jars. In the oven, one the counter, etc.