Where can I find Particle in Grenchen?

Particle can also be found in these cities:

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

You can also find this in Grenchen:

Vegetable Juices Instant Iced Coffee Cheese Roll Canned Fish Fat Sauce Powder Spirits Stews Bakery Products Red Wine