Story told to me on a recent cycling related course: A couple of guys from the training centre were flying back from a cycle show, weighed down with the usual freebies of new products. One of these was a sample of a cycle degreaser.
This liquid was more than 100ml which is air-travel heresy. On top of that it is a suspicious dayglo blue. The last straw was the name - for which click here.
They were delayed in the terminal for some time.