  We consider the flotation of deformable, non-wetting drops on a liquid
interface. We consider the deflection of both the liquid interface and the
droplet itself in response to the buoyancy forces, density difference and the
various surface tensions within the system. Our results suggest new insight
into a range of phenomena in which such drops occur, including Leidenfrost
droplets and floating liquid marbles. In particular, we show that the floating
state of liquid marbles is very sensitive to the tension of the
particle-covered interface and suggest that this sensitivity may make such
experiments a useful assay of the properties of these complex interfaces.
