True Lemon works for me. It is crystallized lemon. No sugar, no artificial sweetener. Just lemon (or lime or orange). I've been longing for flavor in my drink since giving up Diet Pepsi, and this has fit the bill, just in time for summer when a glass of lemon water is so refreshing. Each packet is equal to one wedge of lemon--just stir and drink. Print a coupon here, or sign up for a free sample (and search for stores near you that carry True Lemon) here.