Eco-Shell Biodegradable Quahog Shells were invented to be used as Quahog shell food containers. They can withstand warming temperatures up to 428 degrees and freeze to -35 degrees. The two shells are joined by a realistic clam shell hinge. Eco-shells can also be used for crafts or as a unique party or business mailing invitational item (Weddings,clam bakes,party invitations). Come in packages of 50