Tony drinks 72 ounces of water per day. He decides that to stop wasting plastic, he will buy a reusable metal bottle. If he buys an 84-ounce water bottle, how many times will he fill it each week?
He drinks 504 ounces of water per week because 72 x 7 = <<72*7=504>>504
He will need to fill it 6 times because 504 / 84 = <<504/84=6>>6
#### 6