Quote:
Originally Posted by crich70
I think they would have switched to plastic bottles sooner but they had to find a plastic that could hold the pressure of the carbonation. At about the same time (mid 70's) they switched from tin to Aluminum cans for soda pop too. They had pop top openings like beer before that as well unlike the flip top opener that they have now. My dad put a glass bottle of Pepsi in the freezer (to get cold) and forgot it once. Naturally the bottle shattered since ice takes up more space than liquid and we were cleaning bits of frozen Pepsi out of the freezer for a long time after that. Film stock changed in the 70's as well. You can see that from how older 3 color Technicolor films from the 50's (like "The Robe" ) kept their colors over decades but movies like "The Godfather" were turning yellow after just a decade in the can. The two color process may have been cheaper but the film stock wasn't as long lasting in terms of keeping its colors bright. That's why a number of DVD's are 'digitally restored' I think. They had to restore the proper colors to the prints.
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Oh yes I remember when tin cans for cola and beer switched from the stronger tin that required a bottle/can opener to open to the lightweight aluminum cans with pull tabs to open them. We all thought it was so cool that we could easily crush the aluminum cans in one hand. Originally the pull tabs for opening them were designed for the entire tab to be pulled off the can. Some people had trouble with them because they would put them back into the can then accidentally swallow it. Also they made for a lot of litter in the form pull tabs lying everywhere. I'm glad they redesigned the tabs so that they stay on the can. Prior to pull tabs and twist off lids, a lot of us carried military style P-38 and P-51 fold-up can/bottle openers on our key-chains.
