A mixer for mixing concrete components comprises a chassis and a mixing drum mounted for rotation with respect to the chassis and having an open end. The chassis includes a lifting structure extending beyond the open end of the drum and a support structure spanning the open end of the drum. The mixer is moveable between an inverted orientation in which the open end of the mixing drum faces generally downwards and a mixing orientation in which the open end of the mixing drum faces generally upwards. The lifting structure is arranged to engage with a container with the mixer in the inverted orientation, and to lift and invert the container upon movement of the mixer to the mixing orientation. The support structure is arranged to support the inverted container above the mixing drum when the mixer is in the mixing orientation. Also, a method for producing a concrete mix.