20 to 25 5gallon Bottles

5 gallon bottle = 20 kilograms

60 kilograms = 132 pounds (assume to be average weight of a person)

I have seen Suzuki Multicabs with ten passengers in the back.

If each person weighs the same a 3 5-gallon bottles, so the Suzuki Multicab is carrying the equivalent of 30 5-gallon water bottles.