Abstract: A container has an integral wall defining a moat or channel around its top edge and a lid that seals both with the rim of the container and the upper edge of the moat. The seal can be a plug-type seal, a telescope-type seal or a rim-seal where the rim of the container and/or the upper edge of the moat are held between integral upstanding walls on the rim. Combinations of two different types of seal may be used.

Abstract: A portable cooking installation consists of a heat-insulated enclosure containing a plurality of separately controllable electrical-resistance heating element surrounding and at least partially defining a space to receive a cooking vessel. For instance, two, three or four strip elements formed into circles of progressively increasing diameter (reckoning upwards) lie horizontally around a common axis to define a space to receive a suitably tapering cooking vessel; the elements can have aligned planar inner surfaces and be mounted on a resilient common support to improve vessel/element contact.