as was noted, i'm sure that some manufacturer realized they could save 5% material by cutting the size of the can so it holds 5 gallons including the expansion. the legal department surely looked to make sure they weren't getting into false advertising, so it's the typical buyer beware situation.
slightly off topic, but how many of you have uttered the phrase "half gallon of ice cream" in the last several years? not too long ago it was a half gallon - i just grabbed the half gallon of milk from the fridge and it says 1.89l, so i assume that's the same for ice cream measurement. i never know if there's a difference between liquid and solid measurement. now all ice cream containers are 1.75 liters which is a nice even quarter liter number, but i'm sure that the change was just slid past the consumers nice and quietly. i'm wondering why milk hasn't been downgraded yet?
I think its because milk pricing is set by the government, and the dairy farmers actually lose out big time, because they cannot control how much their milk is sold for. I noticed that this year with ice cream, and yogurt. They are all smaller sizes, yet the same price. I found at least where I live in New Hampshire, if I buy the store brand ice cream, they are the only ones who still offer a true half gallon. I am, and have been very upset how cheaply everything is made now. I buy an air tool, and I don't expect it to last, because they quality control is just not there. Its all about mass production. I got into a head on collision last fall with my Toyota, and the air bags, and the seatbelt failed. An investigation discovered that they were defective from the manufacturing line, and that the car company has known about it for years, and they have very quite back office acceptable losses of life that they will pay out before they do a recall, and the numbers are high. Its terrible. A lot of times the air bags are not even conected in the steering wheel. If you know what you are doing, I would check your connections. Sorry to get off topic, but I am out of ice cream, so I have to run to the store
The U.S. Government regulates milk prices.
Most people are surprised to hear that the Federal Government sets the price that us Milk Processors pay for Raw Milk. This price is set each month, and varies up or down depending on many worldwide factors. These factors include: the availability and price of cows, the price of feed grain, the price of diesel fuel, the price and availability of corn, current forecasted crop yields, fertilizer prices, transportation costs, just to name a few.