Some weeks ago I posted to the UK & Ireland forum about a run-in I had with a security screener at ACI who tried to tell me that I couldn't take my emergency water ration through security because it was in an unmarked plastic bottle - see

http://www.flyertalk.com/forum/showthread.php?t=678564

I wrote to complain, and had a letter back from the screener's boss telling me I was right and the screener was wrong.

Today I had the same again - at HAM this time. I have taken unmarked bottles through security here on several previous occasions without any problems, this time they were trying to tell me that only bottles with manufacturers' labels are allowed.

I researched the issue last time, after the Alderney incident, and could find no evidence that such a rule exists, but both the screener here and his boss were absolutely insistent that my 60 ml water bottle was illegal (they eventually let me carry it through after I drank the contents)

There was no language issue BTW - I grew up in Germany.

Has anyone else had grief with unmarked bottles?

Edited to add: I was told this is an EU rule - so would be particularly interested to hear from FTers in Europe.