Question: how many 16 oz bottles of water equals 3 liters?
Answer: It would take roughly 4 bottles. You may have some room to add a little more water to the 2 liter container with a fifth bottle. Four 16.9 oz bottles, each being 500 ml ( 0.5 liters) = 2 liters. 16.9 oz = 0.5 liters or 500 ml.