The Caisa is an instrument made of steel, and its made in Germany by Bill Brown, a great steeldrum builder.
Basically, the Caisa is kind of a "inverted steeldrum", so you do not need any mallets to play it, just use your hands.
Actually, i own 2 Caisas tuned in D and C minor, but there are other tunings available.
Unfortunately i'm on a budget :-(.
I use my Caisa's at different locations, e.g. @home, in the woods, in caves and on mountain tops to welcome the sun during sunrise.