Well, cola is mostly water anyway - it may be a bit denser because of the sugar and other ingredients, but they'd probably weigh pretty much the same...
That's a nickname for "girl", like "My gal Sal" (SALLY)
cook it to a boil
One gallon of water weighs 128 ounces. A pound is 16 ounces. 16 times 8 is 128. What does it weigh?
Water weighs 8lbs per gallon
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