Of course the ubuntu can just contains dirty brown water. You have to boil it for a few hours so it's drinkable. Decide on a wide range of flavors of which most taste like sh*t. Add your own carbonation because licensing restrictions only allow you to have flat water out the box. When you're finally ready to drink it the pull tab will break off requiring you to use a workaround where you punch a hole in the side of the can.
The Windows soda tastes vaguely similar to iCola, but you have to be really strong to open the can, can only pour it in one glass, and you can't give anybody else a sip of it. Also, about a third of the cans contain salmonella.
iCola tastes incredible, but it costs like $400 bucks a can.