Here’s the details straight from their blog Slipcast:

For a limited time, Matt and Dave’s Clays is having a back to school sale!

“No way” you say?
Way, we say!

Right now, you can stock up on both our high temperature Porcelain for the People and our mid-temperature body, The Coup!
Even better, our Cast Away, casting slip and Stuck Up, building and attaching slip are also on sale.
Get all your clay supplies for the new school year or just to stock up your studio.
Our amazing clays are only $24 for 30 pounds, shipped.
Cast Away can be sent to you for only $35
You too will be Stuck Up for just $9
Head over to our website now.
www.mattanddavesclays.com