This instructable walks through the process of making a mouth-friendly edge on an aluminum bottle turning it into a Cool Reusable Metal Tumbler Cup.
The steps outlined here are, stand-alone, instructions to make a complete Metal Tumber from an aluminum bottle; suitable to use as a lightweight tankard for all your favorite beverages.
(I recommend the chilled kind. Remember science?...aluminum is an excellent heat conductor; you don't want hot cocoa burns on your fingertips as well as the tip of your tongue!)
However... those of you familiar with the Aluminum Bottle Backpacking Stove,
( http://www.instructables.com/id/Aluminum-Bottle-Alcohol-Stove/ ) will also recognize the technique demonstrated here, as a means for creating light weight cooking tools to accompany an alcohol stove.
The video below shows these Aluminum Bottles & Tumblers in use as a lightweight backpacking cook / storage system.
The bottles are obviously used for beer (and I know at least one soft drink) however, availability of either (or any for that matter) varies by region.
As an added note: I had reservation about posting an instructable that featured an alcohol container as it is not appropriate for all. I would have perfered to use a soft drink bottle however due to availability in my area, I only have found the beer bottle variety.
But ultimately, its the aluminum bottle that we're interested in, not necessarly the beverage. Dispose of the contents as you deem appropriate, or seek out empties through another source.
(Along the same lines: I am pretty sure not everyone who has built a bar-b-que from a steel barrel personally bought, and consumed the 50 gallons of Crude Oil inside to get to an empty drum.)