I just bought a 2.2 liter jug today. It is the best thing! It looks like a little sparkletts type bottle (the kind you stick on the machine) but it has a handle and a sports pop top. It was only 3.99 at Walgreens. You would think it was huge but it really doesn't look like it holds 8 glasses of water. I double checked and 2.2 liters is almost 73 oz. If I can get one of these down a day, I'm good to go!!! One of my better buys I must say.
I don't drink any flavored waters, eww. I pretty much stick to regular filtered or bottled water and sometimes a glass of Crystal Light. Maybe a glass of suntea every once in a while.

I used to just use plastic water bottles that you buy in the store and just keep them and reuse them, but it wasn't always appealing to go fill those bottles up, for some reason. They were all crackly and the label comes off and then their sticky, etc. etc. So I went and got a 1 L Nalgene bottle and suddenly drinking water became even more fun! Sometimes my flakiness astonishes me! 
) but I only put 1 packet of splenda in it - no cream. The only other thing I drink with any consistency is Crystal Light Sunrise. I love that stuff!