there is no need to put it in the freezer, if you put it in anything that can seal it will be just fine...just put it in a ziplock, suck the air out, seal it and then if you're still worried, just put the bag in a jar.

btw, mason jars are those jars that you store like canned fruit and shit in...it has like the little circle piece that goes over the top of the jar, then the screw on top goes over that.