Toilet Duck
is actually a refined version of a much larger 1950s product, Basin Swan.
(
The Coast Of Yemen,
Tue 18 Aug 2009, 14:06,
archived)
Which is in turn a small version of the ancient Grecian Bath house Roc.
Famously later immortalised in song by Elvis Presley.
(
riverghost servicing your mum since,
Tue 18 Aug 2009, 14:12,
archived)