This article in Food Production Daily reports on a double can able to hold two different drinks and a resealable can.
from: Food Production Daily
(click image for full story online)
(click image for full story online)
The former is merely a patent while the latter is a design which has been developed with Coca Cola and should be in the market soon if not already launched.
These developments add to the popularity of the can which relies on its light weight, stackability, ease of cooling, ease of opening, robustmess and tamper evident design.
There seem to be endless options here if you think about it!