Some plastics are very bad, sometimes more for the bad flavor effects than
the toxicity. The acid content should sanitize the wood fine. Sauerkraut,
I think, is sometimes stored in wood barrels. Vinegar, alcohol and fermented
foods are not conventional foods and can kill any microscopic bugs lurking
in wood. Fresh food should never be stored in wood.
Also, there do exist spigots made of HDPE but I don't know if they have