I noticed Diet Dr Pepper tastes different about a year ago. At first I thought I got a bad batch. No they are all bad. Most are flat when you first open them. Some are fizzy but they still taste disgusting. I used to love them. Switching to Diet Coke now. At this moment it tastes so much better than diet dr p. I sent a message to their corporate. I really hope they dont send me any Diet DR P coupons lol