KitchenAid has collaborated with Camberwell Electrics to celebrate its 100th Anniversary, by offering consumers a series of gift vouchers on purchases of its major domestic appliances. Valid until December 31, the tiered promotion gifts consumers a range of e-vouchers according to their spend level (below). KitchenAid's 'major domestic appliances' encompasses ovens, cooktops, rangehoods, refrigeration, warming drawers, coffee machines,…