The present invention provides a cartridge for a beverage preparation system, the cartridge comprising an inlet for the introduction of an aqueous medium into the cartridge, an outlet downstream of the inlet for the discharge of a beverage from the cartridge and a flow path connecting the inlet to the outlet, wherein the flow path includes within it a non-gelled beverage liquid concentrate containing about 0.01 to about 5 weight % in total of one or more thickeners. The cartridge may comprise an aperture having a cross-sectional area of 2 mm2 or less downstream of a chamber in which the beverage liquid concentrate is loaded. The beverage concentrate may comprise methyl cellulose and at least one alginate in a weight ratio of 1:5 to 5:1 to provide improved the organoleptic properties such as mouthfeel.