yak butter
... that yak butter stays edible for up to a year and finds a new use after it gets old and rancid?
... that <b id="mwDB8"><a href="./Yak_butter" id="mwDCA" rel="mw:WikiLink" title="Yak butter">yak butter</a></b> stays edible for up to a year and finds a new use after it gets old and rancid?