Why is salmon packed in a non-standard sized can ?

Question

I'm referring to the larger size cans ( maybe 12oz , or so ) . They taper down to a smaller size at the bottom . What's the purpose of that ?

Answer 1

There is more than 1 standard size, for example, size 1/4 contains one serving of half a cup with an estimated weight of 4 ounces; size 1 "picnic" has two or three servings of one and a quarter cups with an estimated weight of 10½ ounces; size 303 has four servings totalling 2 cups weighting 15½ ounces; and size 10 cans (most widely used by food services selling to cafeterias and restaurants) have twenty-five servings totaling 13 cups with an estimated weight of 103½ ounces. These are all "U.S. customary" cups.
The smaller bottom is designed for mass distribution to canneries. The can be stacked therefore, easier and cheaper to ship to the processors.
For more, see the link.

Answer 2

I have never seen that- the canned salmon I buy comes in normal cans about the size of tomato sauce and also tuna fish size.