A container (104; 1104; 4104) for a food preparation appliance, the appliance including a blade member rotatable relative to the container (104; 1104; 4104) in a direction of rotation, the container (104; 1104; 4104) comprising: a closed end and an open end; a bottom defining the closed end; and a tubular sidewall (108; 1108; 4108) extending from the closed end to the open end and, together with the closed end, defining an interior space of the container (104; 1104; 4104), the container (104; 1104; 4104) being configured to accommodate the blade member within the interior space of the container (104; 1104; 4104), the container having a center, the sidewall (108; 1108; 4108) having a rim (112; 1112; 4112) at the open end, through which contents to be processed by the appliance are loaded into the interior space of the container (104; 1104; 4104), and a rib (202; 1202; 4202) projecting inward of the interior space of the container (104; 1104; 4104) and extending lengthwise along at least a portion of the sidewall (108; 1108; 4108) intermediate the open end and closed end of the container (104; 1104; 4104) and having, in the direction of rotation of the blade member, a peak (218; 4218) defined as the shortest transverse dimension measured from the center of the container (104; 1104; 4104) to the sidewall (108; 1108; 4108) at a respective height along the portion of the sidewall (108; 1108; 4108) having the rib (202; 1202; 4202), the rib (202; 1202; 4202) being asymmetric in transverse cross-section, characterised in that: the container (104; 1104; 4104) further comprises a ramp section (300; 1300; 4300) extending up from the bottom of the container (104; 1104; 4104) and extending, in the direction of rotation of the blade member, circumferentially along the sidewall (108; 1108; 4108) of the container (104; 1104; 4104) in correspondence with at least a first slope of the rib (202; 1202; 4202) inclining to the peak (218; 4218), wherein the ramp section (300; 1300; 4300) has a height that increases as it extends circumferentially in the direction of rotation towards the peak (218; 4218). a closed end and an open end; a bottom defining the closed end; and a tubular sidewall (108; 1108; 4108) extending from the closed end to the open end and, together with the closed end, defining an interior space of the container (104; 1104; 4104), the container (104; 1104; 4104) being configured to accommodate the blade member within the interior space of the container (104; 1104; 4104), the container having a center, the sidewall (108; 1108; 4108) having a rim (112; 1112; 4112) at the open end, through which contents to be processed by the appliance are loaded into the interior space of the container (104; 1104; 4104), and a rib (202; 1202; 4202) projecting inward of the interior space of the container (104; 1104; 4104) and extending lengthwise along at least a portion of the sidewall (108; 1108; 4108) intermediate the open end and closed end of the container (104; 1104; 4104) and having, in the direction of rotation of the blade member, a peak (218; 4218) defined as the shortest transverse dimension measured from the center of the container (104; 1104; 4104) to the sidewall (108; 1108; 4108) at a respective height along the portion of the sidewall (108; 1108; 4108) having the rib (202; 1202; 4202), the rib (202; 1202; 4202) being asymmetric in transverse cross-section,