The famous manufacturers of bathroom porcelain, 'Armitage Shanks' used to test their flushes with a half a folded copy of the Telegraph newspaper. If the loo could cope with that, it could cope with anything a mere human could drop in it.

(Little aside here, whilst on a canal in Shropshire, we sailed past a porcelain factory that had literally hundreds of loos lined up outside it, for loading. The factory was called 'J W Shufflebottom'... a name I thought extremely appropriate).

There are commercially available 'moist towelettes' for travel use that will degrade reasonably quickly, but for the old fashioned amongst you, don't use glossy magazines... they are (apparently) nowhere near as absorbent and difficult to flush away.

LTS