MH 108
Tinctures and essential oils must be kept in glass.
Syrups do ok in plastic, they are normally a conentrate and do not absorb.
Believe it or not, Dr. Hulda Clark's son, Geoff Clark, owner of Self-Health, the store that sells "ONLY" pure uncontaminated so called products examined by the famous syncrometer that measures down to 1 part per trillion, uses plain old plastic 55 gallon chemical drums to make the $$$HIGH$$$ plain walnut tincture. I asked him about this years ago and he said it didn't matter.
I think a tincture of 50% ALCOHOL should be kept in glass.
Blessings,
MH