The Delta flight is cheaper. But check a bag at a cost of $25 for the first checked bag each way on Delta, and your total fare climbs to $256 -- more than the cost of the Southwest flight, which includes free first and second checked bags. Add a second checked bag for $35 each way on the Delta flight, and you'll pay a whopping $326.
It all depends on the size of the glass your going to use. A 1 gallon container holds. 128 ounces of liquid, so if you are using an 8 oz. glass, that's 16 glasses of water. Ten oz. glass is 12.8 glasses of water and so on. Sincerely yours,
Seems like you're asking about how many of these water bottles it will take to have one gallon of water. A gallon is a measure of volume, 231 cubic inches. It would be much easier to calculate if you used the same kind of units for both the gallon and the bottles.