Little fluted paper trays play a major role in Berlin eating. They support slices of cake in waxed paper bags being transported from bakeries to offices every day, carefully balanced on the palm of the hand, to be eaten with afternoon coffee. Deeper versions hold Currywurst and Pommes rot-weiß.
At the Leipzig book fair, I saw a handmade book about Currywurst that an artist had made by spiral-binding several of these paper trays together. Recently, I’ve seen noticed people using them to make something a bit less elaborate, but charming: shop window signs.