How can I find the diameter of a 5 foot tall cup (It's a crazy sculpture idea of mine) with x amount gallons?

Question

I know the cup has to be 5 feet tall and I want an even amount of gallons (It's easier to fill up) and I need to know the diameter. I also plan to build a giant bendy straw and drink soda from my huge cup. So please help a confused young artist wannabe.

Answer 1

After you make it, get an empty jug (1gal) and a water hose or something of the sort and just keep pouring water a gallon at a time, into the cup unltil you have it as full as you want it to be, then you'll know how many gallons you want of soda in it, and you can get that much.

But if you already have a number of gallons you want in it, then I don't know what to tell you.

Hope I helped(: