If they are "liter" bottles, then you would need 2.
about 8 water bottles:)
270 liters is equal to approximately 169 54-oz bottles.
It takes about 12.6 8-oz bottles to equal three liters.
About 4.2 16-oz bottles are equal to two liters.
Two liters is equal to approximately four 16.9-ounce bottles.
Surprisingly enough, it depends on the size of the bottles!
Two liters is equal to approximately 7.5 9-ounce bottles of water.