Thoughtful green design of our marketing and packaging materials has made CST a leader in our industry. CST's marketing and packaging materials are made from the highest amount of post consumer paper based on design. These materials include everything from product promotion pamphlets, to shipping envelopes, and antibody vial boxes. In addition to our commitment to using pulp from post-consumer resources, the raw paper we use is certified by the Forest Stewardship Council (FSC). We ship most of our temperature-sensitive products using a shipping cooler composed from cardboard, mineral rock slag wool, and biodegradable plastic. This shipping cooler has the same thermal properties as a Styrofoam box but can degrade in a landfill. While we are proud of our track record in sustainable packaging materials, we are always thinking of new and creative means to improve our packaging to maintain product quality while minimizing our environmental impact.