A Little Riddle

I received a gift a couple of years back that came with this riddle.

What Am I?

I'm smaller than a placemat, larger than a coaster,
Perfect for a pastry straight out of the toaster.

There's a spot for your cup and a space for a treat
Perfect for keeping your work desk neat!

And if you have a drip or your little cookies crumble
All I need is a wash and a low heat tumble.


What do you think it is?