I think I might start gifting mine little cannabis plants 🤣
Seriously though, in my experience alcohol often leads to domestic abuse, mental breakdowns and suicide. I know there is a massive load of people who can drink perfectly fine, but I also have seen enough people die from suicide, alcoholic liver disease and other alcohol related illnesses to not want to gift it to the wrong people. I wouldn't want to give someone a bottle, that they take home. Their abusive partner drinks it, and injures them or their kid. They or their partner (or both) relapse after years of sobriety and end up dying a horrible alcoholic death. Or they have a couple of glasses on the last day of term, drive home and get in crash and end up at best with a drink driving conviction, at worst dead or with somebody else's death on their hands.
I do also know that my life experiences have left me very anti alcohol in a way I wouldn't have been had I had different experiences. I know alcohol is seen as a common gift, that it is a social norm to gift alcohol. Despite that I cannot gift anyone alcohol in all conscience.
For me it is like gifting then drugs or cigarettes or strong painkillers or sleeping tablets or something.
Yes I know we live in a country with a massive obesity problem, but I do not feel as uncomfortable about gifting food stuff. If the teacher doesn't eat it and takes it home and their abusive spouse eats if all, they might get a tummy ache. If the teacher scoffs some on the last day of term and drives home, they will just drive home. If they have been on a diet and relapse on chocolate they will probably be ok soon enough.
Personally we mostly do a card and something the kids have made for them if they've done that. Or maybe something the teacher has mentioned, like if the teacher is obsessed with lady birds we might get a purse with a ladybird on it or if they always have a Costa on their desk each morning then a gift voucher for Costa or a Costa travel mug.