Ice-Locker® (U.S. Patent #5,924,302 International patents on file) controls Thermal Conduction by pre-molding the precise amount of insulation into a barrier wall which is engineered to allow the desired amount of energy to pass into the product cavity from the coolant. By "locking" the coolant and product into their own seperate compartments damage is minimized by preventing collisions. Product contamination is minimized by the entrapment of both residue and condensation from coolants.