UTFSE for "stopper GBL" (https://www.the-hive.ws/forum/search.pl?Cat=&All_Forums=on&Text_simple=stopper%20GBL&Preview=on&RatePlus=on&RateNeutral=on&Search_simple=on)
Post 421276 (https://www.thevespiary.org/talk/index.php?topic=5780.msg42127600#msg42127600)
(hCiLdOdUeDn: "Cork contains", Chemicals & Equipment)