[color=blue]
> Hi,
>
> Just a quick question that maybe one of you knowledgeable people here can
> answer.
>
> I'm after a large glass container (around 5 litres?) like a demi-john, but
> with a tap in the side, at the bottom.[/color]

gee, demijohn i think 50 litres, do you mean 5 or 50?Anyhow i've never
heard of a demijohn witha tap. Never heard of a carboy with a tap
either. Um what about a chemistry supply store? There are some
interesting glass vessels that might do the job for you. HOw about a 2L
separater funnel
[url]http://www.indigo.com/glass/gphglass/separatory-funnel.html[/url] ? Of course
you are looking at $60 US, but it's glass and it has a petcock/stopcock
to controll flow.
[color=blue]
> It is to be used in a shop display, whereby a liquid can be poured into the
> top to fill it up. The liquid can then be dispensed in small quantities
> through the tap at the bottom.[/color]

thought about using plexiglass? Some bars here sell cheap draft by the
"beer tower".. which is a plexiglass tube (5" diameter or so?) about 3
feet tall with a tap on the side. All the parts would be easy enough to
find. Oh found one online, it's only 3L but it'd give you and idea
[url]http://www.drinkstuff.com/products/product.asp?ID=121&title=Booze%2BTube[/url]

oh and another here
[url]http://www.longneckdist.com/store.asp[/url]

and a few more here:

[url]http://www.rocketpacks.de/biertower-biertower.htm[/url]
[color=blue]
>
> I've searched all over the internet but can not find anything suitable
> anywhere! There seem to be lots of normal demi-johns, but none with a tap in
> the side.
>
> Is there a special name for such a type of container?
>
> Please help![/color]
hope this helps, best of luck in your searches.