> Corks or caps? How can you look at a line of bottled wine and see the
> corks?
<<...>>

Pretty easily. My bottles are stored on their sides, with the corked
ends pointing out. The first thing you see is the end of the cork.

I presume we're not talking about crown caps here (the metal closure
crimped on, commonly used for beer bottles). Are we talking about the
colored, usually plastic things placed over the corked end of the
bottle to make it look finished / pretty? The ones I've seen marketed
to home winemakers are heat shrinkable, and are available in a pretty
wide variety of colors, patterns, etc. in North America. I don't know
what's available in the UK, but there are bound to be plenty of online
merchants in the US that would be happy to sell you some of these.
They are so light that shipping for several hundred of them shouldn't
cost much.

Doug