Some of the groceries or pharmacies, more likely, have pre-printed medical alert bracelets, and one has a generic "Allergeric reactions" or "Allergy" already printed on them, usually in stainless steel, occasionally in gold, or these can be ordered from the same companies or online. It can save a lot of money than custom ones. I then have in my wallet, a list of the allergy(ies) and reaction(s) next to my insurance card(s).