chocolate

I know that chocolate which has alcohol in it is haram... but what if I bought one and I thought it didn't have alcohol but I realised later after I bought it (before I eat it) that "barley malt extract" was alcohol (i was in a hurry when I bought it so i was looking for any "ol"s and I didn't notice "barley") I didn't eat it. I'm thinking of giving it to my non-muslim teacher. Is it haram to do so? Or should I just throw it? It's just that I want to give some sort of thanks to that teacher because he's my supervisor in all Duke of Edinburgh's awards and he was good... and this is my last year, so I thought I'd give it to him instead of throwing it. Can I do that or is that considered part of "transporting wine"?