Gasless Coca Cola

I don't know if I'm the only one but my issue with Coke is not the taste but the gas. It used to have a lot of gas but nowadays it is half flat when you open it. I have tried the 2l, 1.5l, 1litre, 500ml, etc... If you lucky and it's somewhat gassy when opened then a hour later it's flat. It is really dissapointing because if I say open Tonic and Leave it in the fridge for 4 days and then have some it is still gassy. So why can't Coke give me the same experience? Do you want the consumer to not finish the 2l and go buy a new 1? Mixing it with brandy also makes the brandy really taste **** as its flat. Machine mix tastes better at a pub.