I have done the vacuum bags and freezing and it worked for me, just dont pull too much of a vacuum. or you can crush the buds. I have a few Cvaults that work well but they are expensive. Kimchi containers work really well also and they come in lots of different sizes

https://www.amazon.com/jen-Kimchi-Container-Probiotic-Fermentation/dp/B00SWBJJQ0/ref=asc_df_B00SWBJJQ0/?tag=hyprod-20&linkCode=df0&hvadid=167141564589&hvpos=&hvnetw=g&hvrand=14560450112001462424&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9002561&hvtargid=pla-392148274494&psc=1