there's many companies that offer these.
endermology is one machine system that 'reduces the appearance' of cellulite through a vacuum-like device. there's a couple of companies that make a version of this machine.
i've worked with cellulite/firming products in a resort spa environment. generally, these products are recommended for a series of 5, 6, 10, or 12 to 'see the desired results'. i've not done any as a series for any one person, because it's a resort and people are vacationing. the mask was self heating, and it was strictly offered as a body part service, not a full-body experience.