I have a large amount of green, grolsch style bottles. love how much easier they make bottling. I wanted to check how long beer lasts in them. I figured anything i'll drink in the next 6 months should be good, but i was planning to make some long haul beers soon (rye porter, coco stout, belgian dubbel). should i avoid these handy, dandy bottles and stick with the capped kind or will they keep the beer good for a year or more?