@Tall_Yotie All that because foam is like 100% of CO2, and that's precisely what we want - no air inside. You can fill normally, sure but quality in quality out - right?
If you gonna drink those bottles quickly, and stored cold - no problem.
You prob. builded up too big pressure, you'd fill sloooowlllyyy
And burp 3-4 times OR use some needle
I know it's a helluwa pita process.