Theo, Mason, and Roxy are siblings.  Theo drinks 8 cups of water every day. Mason drinks 7 cups of water.  Roxy drinks 9 cups of water every day.  In one week, how many cups of water do the siblings drink together?
Everyday, the three siblings drink 8 + 7 + 9 = <<8+7+9=24>>24 cups of water.
In one week, they drink a total of 24 x 7 = <<24*7=168>>168 cups of water.
#### 168