I used to buy a 2-liter of pop every week. I decided to try and cut pop out at least when I am at home. I still enjoy a coke occasionally, especially when we are out for pizza or at a movie with popcorn.
What helped me in this transition was making iced tea instead. I found a super easy way to make it that does not include boiling water or sitting it in the sun all day, and uses a mason jar which we all know I love!
Basically, you take a jar, put in 4 tea bags, fill it to the top, screw on the lid and put it in the refrigerator overnight. In the morning, take the bags out and give them a little squeeze over the jar. What this does is makes an iced tea concentrate! Love it! Now when I want a glass of tea, I pour about 1 part concentrate to 3 parts water into a glass of ice and stir. I adjust the amount of concentrate depending on how weak or strong that particular brand of tea is. Here is the blog that I got the idea from, there are a bunch of comments regarding specific measurements if you are someone who likes more details.
*the picture above was taken before the jar sat overnight. The concentrate gets much more, well, concentrated:)