We checked a bag with 2 dozen 20 oz water bottles on a USAir flight a few years back with no problems, but that was before the airlines got stricter with the 50lb per passenger weight limit. For easy reference, H2O weighs 1 lb per pint, 8 lbs per gallon. Since a Towncar has been our method of getting fro MCO to WDW we make a grocery stop and load up.
Bill From PA