A single piece body foldable along hinges between a three-dimensional generally closed configuration and a generally rectangular two-dimensional configuration. Pockets are arranged along one or more endsections of the packaging, and an absorbent material is at least partially adhered to the moisture proof sheet at a workspace thereon. The optical measurements include at least two measurements with different polarization states of incident light, each measurement including illuminating the measurement site so as to illuminate one of the diffractive structures through the other. The container is received in a housing that provides a pair of coils that are in a spatial relationship with the installed refill container’s coil.