I use a mason jar - fill to the top with your kraut, pour in some liquid to displace all the air, then use some of the leftover liquid to give your next batch a head start.
I'm no expert, but as long as you have no mold or slime growing ( most people just remove it, yet there is some controversy as to if it is healthy) and you want to retain the healthy live culture just pack it into containers and refrigerate. If you want long term shelf stability then you would can it water bath method would be sufficient. I have read not to use metallic utensils plastic an wood will not react, and yes use your kraut juice in packing. Hope that helps!
Thanks. The more I googled the more they pointed towards the canning method. I think I'm going to just try putting it in a mason jar. It's my first batch experiment. Definately smells like kraut and there's no slime or mold. Might have used a little too much salt as without being patient I wasn't getting much water halfway thru. In the end I got a lot of water. I'll probably extract it next weekend.