Wow that's awesome. We live in a society where one person takes credit for something and in this case a Coke can is comprised of many inventions as are many things. You never hear about the guy who helped shape the process of creating the bottom of soda cans or the tab on them. I wonder who invented that piece of plastic that holds store bought bread together?
Loaves of bread were sold unsliced until 1928, when a guy named Otto Rohwedder figured out how to slice bread without crushing it. Rohwedder then wrapped the bread and inserted U-shaped pins on both sides of the loaf to make it look similar to an unsliced loaf. Sliced bread became a hit because you no longer had to worry about cutting pieces of similar thickness when you made a sandwich.
That's where the expression "the best thing since sliced bread" comes from. Obviously, people had been slicing loaves of bread for ages, but pre-sliced bread really is a relatively recent business innovation. The NYT magazine had a page about this in this week's issue.[1] Also, here is a Google ngram of the phrase "since sliced bread". You can see that the saying started in the 1950s. [2]
"One thing is universal-all bread companies deliver five days a week, with days off being Wednesday and Sunday. Thus, these days have no color coded bread for the deliver driver to remove from the store."
Also, it's not universal the color codes (Which can vary from one brand to another), and in some cases, 7 color codes are used because those bread companies deliver 7 days a week:
http://www.snopes.com/food/prepare/breadtag.asp
