Where can I find Baking soda in Marthalen?

Baking soda can also be found in these cities:

Aadorf Bassersdorf Beringen Bülach Dielsdorf Diessenhofen Eglisau Elgg Embrach Frauenfeld Kleinandelfingen Klettgau Kloten Neunkirch Pfungen Rielasingen-Worblingen Schaffhausen Seuzach Singen (Hohentwiel) Stein am Rhein Stühlingen Thayngen Winterthur Zell

You can also find this in Marthalen:

Everything From Milk Baking Mixtures Cream Stiffener Spreads Savory Food For Diabetics Menus With Meat Fruit Spritzers Filter Coffee Baguette Roll Salt Sticks