Metabolix Launches Mvera™ B5011, A New Certified Compostable Film Grade Resin For Transparent Film And Bag Applications

Metabolix Launches Mvera™ B5011, A New Certified Compostable Film Grade Resin
                  For Transparent Film And Bag Applications

Mvera™ B5011 Expands Metabolix Biopolymer Product Line, Providing Customers
with Compostable Resin for Bags and Packaging with Exceptional Transparency

PR Newswire

CAMBRIDGE, Mass., Dec. 3, 2013

CAMBRIDGE, Mass., Dec. 3, 2013 /PRNewswire/ --Metabolix, Inc. (NASDAQ: MBLX),
an innovation-driven performance biomaterials company delivering sustainable
solutions to the plastics, chemicals and energy industries, today launched
Mvera™ B5011, a new film grade resin that allows for production of
compostable, and highly transparent, film and bags.

Metabolix designed Mvera B5011 to meet international industrial standards for
compostability, while also enabling customers to produce films for compostable
bags and packaging applications with exceptional transparency compared to
competing products. B5011 is certified for compostability by Vincotte to meet
the EN13432 standard and by the Biodegradable Products Institute (BPI) to meet
the ASTM D6400 standard. The new film grade resin processes well on existing
blown film equipment and features a good balance of puncture toughness, tear
propagation resistance, seal strength, printability and durability.

"Mvera B5011 extends our compostable film product line to include a product
with a unique combination of features by pairing robust bag durability with
superior clarity, touch and feel," said Bob Engle, vice president, biopolymers
at Metabolix. "This latest addition to the Mvera film grade lineup is an
example of our drive to produce innovative resins that provide differentiated
solutions to our bag and packaging customers, and to serve broader market
demand."

Mvera B5011 builds on the success of Mvera B5010, which Metabolix launched in
September 2013. Mvera B5010 also offers a balance of physical properties with
the toughness and load-bearing capability needed for translucent shopping and
food waste bags. Mvera B5011 compostable film grade resin is available
immediately. For more information about Mvera B5011, including a product
bulletin, please visit the Company's product page.

About Metabolix
Metabolix, Inc. is an advanced biomaterials company that is well positioned to
address growing market demand for sustainable solutions in the plastics,
chemicals and energy industries. The Company is developing and commercializing
a family of high-performance biopolymers targeted to the markets for film and
bag applications, performance additives and functional biodegradation.
Metabolix's biobased chemicals platform is focused on high-value segments and
applications using its novel "FAST" recovery process. The Company also is
developing a platform for co-producing plastics, chemicals and energy from
crops. Metabolix has established an industry-leading intellectual property
portfolio that, together with its knowledge of advanced industrial practice,
provides a foundation for industry collaborations.

For more information, please visit www.metabolix.com.

Safe Harbor for Forward-Looking Statements
This press release contains forward-looking statements which are made pursuant
to the safe harbor provisions of Section 27A of the Securities Act of 1933, as
amended, and Section 21E of the Securities Exchange Act of 1934, as amended.
The forward-looking statements in this release do not constitute guarantees of
future performance. Investors are cautioned that statements in this press
release which are not strictly historical statements, including, without
limitation, statements regarding expectations for market demand and Metabolix
product development, constitute forward-looking statements. Such
forward-looking statements are subject to a number of risks and uncertainties
that could cause actual results to differ materially from those anticipated,
including the risks and uncertainties detailed in Metabolix's filings with the
Securities and Exchange Commission. Metabolix assumes no obligation to update
any forward-looking information contained in this press release or with
respect to the announcements described herein.

(MBLX-G)

SOURCE Metabolix, Inc.

Website: http://www.metabolix.com
Contact: Lynne H. Brum, 617-682-4693, LBrum@metabolix.com; or Media: Schwartz
MSL Boston, Keith Giannini or Shweta Agarwal at 781-684-0770
metabolix@schwartzmsl.com