Limited edition collector compacts for Diptyque's solid perfume range. They take the regular solid refills, and they're available in Eau Rose, Do Son, Eau Capitale, Philosykos, 34 Boulevard Saint Germain, L'Ombre dans L'Eau. At Selfridges in the UK, £46 - £48 each (the same price as the plain solids).
Solid perfume refills? I did not know there was such a thing. Cool!
There are a few brands that do them, although right now Diptyque and Jo Malone are the only ones coming to mind.
I do like my Eau Duelle solid. Looking at the 34 Boulevard Saint Germain…