Custom thermoforming and packaging. See our web site for details. Jamestown Plastics is a custom manufacturer of thermoformed products and has been in operation for over fifty years for the consumer goods, pharmaceutical, medical, military and automotive industries. We have two locations in the United States, Brocton, New York and Brownsville, Texas. We provide custom thermoforming and packaging solutions for all industries. We are ISO 9001:2008 Certified