Foam (Hard) IGB Lab Special Instructions Landfill IGB LAB USERS ONLY: Take to Shipping & Receiving (Room 265) or place in large cardboard bin outside Room 265. Foam coolers, which are made of plastic #6, can be reused to ship samples that need to stay cold. NOTE! Foam coolers from New England BioLabs, Inc. can be returned for free. Just tape up the cooler, write the Lab’s zip code on the label, and place it in a location to get picked up for shipping.