EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANTS Subsidiaries of Plastipak Holdings, Inc.: Plastipak Packaging, Inc. Whiteline Express, Ltd. Clean Tech, Inc. TABB Realty, LLC Plastipak Packaging do Brasil, Ltda. Subsidiaries of Plastipak Packaging, Inc.: Plastipak Packaging do Brasil, Ltda. Plastipak Packaging Czech Republic, s.r.o. Plastipak Slovakia, s.r.o. Subsidiaries of Plastipak Packaging do Brasil, Ltda.: Plastipak Packaging da Amazonia, Ltda. Plastipak Packaging da Argentina, Ltda. Subsidiary of Clean Tech, Inc.: Clean Tech Slovakia, s.r.o.