Re: a better bag???
I have a newer Gateway Backpack bag and it works great. there is only one insulated drink holder, but there's another zippered pouch that might hold a smaller diameter drink (a 12 oz. can or maybe a 20 oz. bottle) if you really want it to. I've had it since this last winter and while I only play a couple of rounds a week it hasn't shown any wear yet. I personally find it comfortable and like how much space is in there. My only complaint is that the divider didn't fit onto the frame, but I really don't want the divider attached anyway, so it isn't an issue for me.
I also like that I could use it as a regular backpack if needed. I doubt I'll ever need it for that, but it's nice to know it's there.