I made a batch of OpenCola a few years back, I actually prefer the taste in comparison to that of Coca Cola. Brew up the syrup and get yourself a Soda Stream or any other carbonation device and you've got a tasty cola you made yourself.<p>Word of warning, making this stuff is SUPER expensive compared to just buying some Coke from the shop. All of those oils are not only hard to find (especially in Australia), but can be quite pricey when you total them up. Neroli oil is expensive in itself (about $25 AUD for 10mls of the stuff) follow the recipe right down to every warning (you could easily end up poisoning yourself if you make it incorrectly). Remember to get food grade, 100% undiluted oils or you could make yourself really sick or as I said, poison yourself.<p>I skipped the caffeine in mine and it seemed fine without it, but probably would taste better with it. I did notice something was missing, not sure if that's due to the lack of caffeine though I skipped primarily because the dangers of caffeine and the fact small amounts can actually kill you.<p>Don't go making this if you're expecting a 1:1 Coke copy. This has its own unique taste, slightly syrupy. I think the recipe definitely needs more work, but considering it's a free and open sourced recipe it's pretty good as it is.