A hot plate has a hot-plate body from metal, having an upper side and a lower side. At least one heating element is disposed on the lower side of the hot-plate body. The upper side of the hot-plate body is configured so as to be flat, for setting up a cooking vessel to be heated. The upper side of the hot-plate body in an external region has an encircling planar region which lies in a plane, or which forms a plane, respectively, wherein the upper side, radially within the planar region, has at least one internal region which is concavely depressed, which in relation to the planar region is depressed by between 0.05 mm and 1 mm.

A wirelessly operable slow cooker for cooking food products includes a wireless communication device. A computing device, such as a smartphone, can wirelessly communicate with the slow cooker to control and monitor the slow cooker.

A heater for vaporizing aerosolizable substrate material in an electronic vapor provision system has an elongate format and is formed from a planar element of electrically resistive material having a length, a width, and two pairs of opposite edges comprising two major edges substantially parallel to the length and two minor edges substantially parallel to the width, wherein the planar element is curved to form the elongate format of the heater such that the edges of one of the pairs of opposite edges are located adjacent one another and the curved planar element defines a volume to accommodate a porous material for wicking aerosolizable substrate material to the heater.