Well, 1 pound = 16 oz. It will depend on how many oz. per bottle.
Didn't think of that.Just get them delivered.
If you insist on packing them, please, please make sure you double (or triple) bag them and pad them very well with clothing. Do not just put a bunch of bottles in a suitcase by themselves. If those bottles burst, they will likely ruin the contents of several peoples' suitcases.
While you are close, you are confusing the two ways that "ounces" is used. The ounces listed on a bottle are not a measure of weight, but of volume. So, for example, while 16 liquid ounces of water weighs 1.04 pounds, 16 liquid ounces of molasses weighs 1.49 pounds. http://www.aqua-calc.com/calculate/food-volume-to-weight
OP, yes, I think that taking all of that liquid on a plane is crazy. Too much risk of it leaking.
The OP did specifically talk about water/gatorade...so 1 lb/16 oz is a pretty good approximation.
And Gatorade comes in powdered form too.in many cases, if people like flavored water type drinks, you can easily pack those little packets that you add to water for the same idea.... and ice water is free for the asking everywhere at disney..... or just order a case for delivery it will be much easier
While approximate is fine when you are talking about 50 pounds of something going by the bottle weight in FL OZ and comparing that to OZ can bring you to a few pound difference. 16OZ of water does weight slightly more than 16oz of pancake mix. When you talk about mix items such as Gatorade which has other additives the difference is more. a gallon of water weights 8.33 to 8.34 pounds depending in where you get the answer from and contains 128.000128 ounces if you divide 128.00028 ounces by 16 dry ounces you get 8.000175 pounds so just in that amount of water only you have 1/3 of a pound difference.. when you talk about 50 pounds it is pounds difference.. and a big airline overweight fee.