I got a sodastream for Christmas and for a litre of carbonated water with syrup(pop) its 12g of sugar the cola has caffeine In it about 30mg or so I believe. and the Syrup is about $7 a bottle for 9 servings I believe it is so that's like 9 Litres of pop well worth it. The machines usually go on sale often they are not as much. not as much burping with this syrup then with the regular brands such as coke/pepsi though. Which is nice!

I stopped drinking pop totally 2 months ago now though and lost a good chunk of weight.

but try out the sodastream if you want your own soda without the hassle of paying mega dollars for pop at the store each week/month. now I just stick with the flavoured water ones they taste nifty.