8 bottlesAnswer: 8 bottles of 16 oz are required to make one gallon.
There are 128 fluid ounces in 1 liquid gallon. If you divide 128 by 16 you will get 8, so it would take eight 16 fluid ounces to fill 1 liquid gallon.
For example, if the water bottle is 16 ounces in size, then 8 of these make up a gallon. If the water bottle is 32 ounces, then only 4 of these make up a gallon. A 1-liter bottle of water is approximately 33.8 ounces, so approximately 3.8 of these bottles make up a gallon.
A gallon of water by definition is 128 fluid ounces in the United States. Water bottles can vary in size, but the total number of bottles making up 128 ounces can fit in a gallon. For example, if the water bottle is 16 ounces in size, then 8 of these make up a gallon.
16.9 oz bottles are something of an international standard. The size in metric is 500 mL or 0.5 L. So this size bottle arises from the same standards as 2 liter bottles and 1 liter bottles, but for some reason instead of calling them half liters, people resort to calling them 16.9 oz.
Konoha destroyed by Pain. More than three years after the failed Konoha Crush, the Six Paths of Pain of Akatsuki attack Konoha in an effort to capture Naruto. Konoha's forces have some success while fighting the Pains individually, but can do nothing to stop the village's destruction by Pain's Shinra Tensei.
Being aware of it's suspicious position regarding the other villages, the Hidden Mist has a special ANBU division designed to continuously gather information about the other villages, Kage and infamous missing-nin, in case of war or assassination.