Børge@boris This is extremely interesting! It took some time for me to understand the "any jar" thing. I thought at first maybe they used some sort of very soft rubber to seal any size of jar that you press down and hold in place. Had to get to the FAQ before I found that no, they just support one size opening. But it's supposed to be a very common opening, so that's OK I guess, just wish it was more visible. Also strange that you can't buy it without a jar. Still really, really cool stuff!
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