Riddle

Which of these is the odd one out?

Baking tins
Sundress
Garden riddle (sieve)
Baby Grand piano
Perfumed candles

My son took me to the local garden centre last Saturday, I managed to easily find all of the above items with the exception of the garden riddle, which was what I wanted. The lady on the help desk couldn't find them either and had to ask a more expert colleague.

So, I finally got my riddle, but was not tempted by any of the other items.