Dark Star do six or seven of their beers in 5 litre, 17 pint and 36 pint containers. You can arrange to pick them up from the Evening Star pub near Brighton station if getting out the brewery is a problem. It might be too late to get for Christmas now, but ring the brewery sales line on 01403...
Don't want to hijack the thread, but as it's on a similar theme, does anyone know of any off licences with a particularly good rum selection in B&H? Have been asked to get someone "a rum I haven't tried before" for Xmas and all the offies I've been in just had the same half a dozen...