The cost for the 16 and 24 ounce sizes ARE proportional. You can tell because $1.92/16=$2.88/24.
The next largest sizes will be 32 and 56 ounces. I got these numbers by multiplying $3.84 by 0.12 and $6.72 by 0.12. 0.12 is the number you get when you divide $1.96 by 16 (see the first set).
