Ever tried it? In Philippines, soda in plastic bags were delicious! You can so tell that the bag was kinda' dirty, but it tasted delicious! The soda became more soda-y, and the pop tasted so MUCH like pop!
...but of course, if you're asking me now... here... in America...
I suppose I prefer cans more.
Glass is nice, but it's hard to run into... and heavy to lug around when you travel a lot.
Plastic bottles are nice, and it's nice to know you can seal it again... but that's exactly the problem! I seal it and forget that I have it! I usually end up leaving it somewhere for days!
But cans? Easy to drink out of. Quick, fast, and still friggin' cold. And you just toss it away after a few chugs.
...yep, that's how I like it.