A device for treating fabrics in a tumble dryer during multiple tumble drying cycles, the device comprising a support member attachable to a reservoir for storing fabric treatment composition, the support member including attachment means for attachment of the device to the tumble dryer interior, preferably the door, wherein the device, preferably the support member, includes one or more flexible portions which contact the dryer interior and allow positional adjustment of the device relative to the tumble dryer interior, during attachment by the user.