Where can I find Baking soda in Bettlach?

Baking soda can also be found in these cities:

Biberist Biel Bienne Brugg Burgdorf Delémont Derendingen Gerlafingen Grenchen Ipsach Kirchberg Langendorf Lyss Moutier Nidau Solothurn Tavannes Utzenstorf Zuchwil

You can also find this in Bettlach:

Rice Pudding Baking Powder Spelt Bread Nut Nougat Cream Balsamic Vinegar Pork Spice Blends Potato Products Rye Roll Canned Tomatoes