The present invention relates to a disposable kit made up of a sterile pack containing a device for preparing products, notably pharmaceutical or medicinal products, by dissolving and heating, comprising at least one bowl extended by at least one handle. Said bowl (1) has a flat bottom (14) with concave internal peripheral edges (15), said bowl being of constant depth and extended by at least one handle (2), said handle (2) having at least one stabilizing tab (6) configured so that the bottom (14) of said bowl (1) is inclined when the device rests on a flat surface and means (7) for holding, said means (7) for holding further comprising thermal insulating means.
