The invention relates to a container (1) with at least three reaction spaces (2) which in each case have at least one electrode pair for applying an electric voltage for generating an electric field within the reaction space (2) and which are arranged geometrically in at least one row and/or electrically connected in at least one row, wherein at least one electrode (3, 4) of a reaction space (2) is a common electrode (3, 4) with at least one other reaction space (2). According to the invention n+x electrodes (3, 4, 5) are provided, wherein n is the number of reaction spaces (2), with n≧3 and x is the number of rows, with x≧1.