I am going to make a kriek and I know that you carbonate it up to a high level of co2 3.5-4. Some people talk about putting them in champagne bottles and corking them and capping on top of that. I was just wondering if it is possible to just cork them only (as i don't have a capper as I have been using PET bottles with screw on caps), or if a grolsch bottle is capable of handling the level of carbonation.