Mulheimer taler

What are these coins and how much are they worth?

It's obviously not a coin. It's an instrument to push commerce in Mühlheim.

A text from a participating drug store:

Mülheimer Taler

It's worth shopping at your Schloss Apotheke! If you buy something from our self-service range, you will receive a Mülheimer Taler for every 15 euros you spend, which you can collect and exchange for great rewards or redeem in one of our partner stores in and around Mülheim. 

Are they worth anything?

Yeah ‘great rewards’ and other stuff, but you probably need more then two 😉.

You may contact https://en.numista.com/echanges/profil.php?id=103201. He seems to be very knowledgeable over German Pharmacy tokens.

LP