Dr. Pepper Soda

I know some of you hate this large bottle of Dr Pepper because of flat easily. For fresh without flat, I'd suggest y'all put that bottle in refrigerator. The Dr Pepper last few days in refrigerator fresh. I always put it in refrigerator all the time. No problem and not flat. I've drink this since I was young! Love this Dr Pepper in 2, 1 liter, 20 and 12 oz bottle and 12 oz can. :)