i use a chunk of the rubbery shelf liner that is poufy/rubbery stuff that comes on a roll. it's great on shelves, under a kid's butt in a high chair, and under hubby's plate on the table (he has parkinson's, and slippery things are a real pain for him). the cost is pretty small for as much as comes on a roll, and i use it all around the house/camping, etc. makes a quick coaster, too...