A kitchen without a blue toaster is not a complete kitchen at all. This appliance was originally meant to toast bread, but eventually people began using it to heat other small food items. Later on, it upgraded end transformed into toasters of many kinds. From being able to toast just two slices of bread, there came variants that could hold and toast up to 8 slices in just 3 minutes, and there were even those that could toast up to several hundred slices in an hour!
The most prominent types of toasters throughout history are the popup, conveyor and oven toasters. The popup blue toaster is one of the most popular classic toasters that have ever existed. It usually came in the shape of a rectangular prism with two horizontal cavities on top where two slices of bread can be inserted. Pressing the lever on the right side of the blue toaster will turn the toaster on and pull the slices of bread inside. Equipped with some timing or sensing mechanism of sorts, the lever reverts to its original position and the slices of bread pop back out when the toasting cycle is done. Apparently, this is also how the popup toaster got its name.
The second type of toaster, the conveyor toaster, is used primarily for commercial toasting. As the name implies, it has a moving belt that transports objects—in this case, slices of bread—into the main toasting mechanism and toasts a few hundred slices of bread in a short span of time. This kind of blue toaster is especially useful when you have a business that has fast turnover of bread.
The oven toaster is a hybrid of an electric oven and a regular blue toaster. Design-wise, it looks like a minimized electric oven. It is trapezoidal or rectangular in shape, it has a pull-it-to-open door, a tray inside, and a switch or a set of buttons for setting the toasting time. However, if you put food inside, it functions very much like a blue toaster, except that it can toast other things such as pizza, hotdog, fish and other small food items other than bread.
Definitely, without this kind of appliance in the kitchen, a home will never be complete.