Oven gas stove included the AGA cooker invented in 1922 by Gustaf Dalén. The first electric ovens were invented in the very late 19th century, however, like many electrical inventions destined for commercial use, mass ownership of electrical ovens could not be a reality until better and more efficient use of electricity was available. More recently, ovens have become slightly more high-tech in terms of cooking strategy. The microwave as a cooking tool was discovered by Percy Spencer in 1946, and with the help from engineers, the microwave oven was patented. The microwave oven uses microwave radiation to excite the molecules
Percy Pig types are vegetarian as stated on the back of the packet. Exceptions include the “congratulations Penny and Percy” line and the globetrotting Percy range. As of 2 August 2011 a vegetarian variety of Percy Pig sweets that uses beeswax and pea protein was made available from Marks & Spencer. They have green ears to indicate them being vegetarian. Other variations include one with additional cola and grape flavours, known as Percy Pig & Pals. In 2010, lemon-flavoured Penny Pigs and smaller Percy Piglets were added to the line. In August 2009, "Phizzy Pig Tails" was added to the line. Reversy