Replace your soda with lemon water

Drinking lemon water has a lot of benefits ranging from aiding digestion to improving metabolism. Lemon water also helps if you are trying to lose weight. You can read more about the benefits by clicking on this link. With all the benefits listed, I would strongly suggest that you replace your soda with lemon water immediately.

Amount

Some say squeeze half a lemon on a glass of water. Some would slice a whole lemon and put it in a liter of water. The mixture is really up to you. If you're trying to substitute soda or juice with lemon water, I would suggest that you do not put sugar. I personally don't.

Juicers

To make squeezing lemons easier, you might want to try out the cheap juicers below:

Taurus T600 Citrus Juicer (White)

HengSong Fruit Juicers White  

Mini Manual Juicer Hand Press Fruit Extractor