2. Materials and methods
2.1. Materials and fruit packaging
Highbush blueberries (V. corymbosum L., Elliott) provided by MBG (Michigan Blueberry Growers) Marketing
(Gran Junction, MI) were transported to the School of Packaging in insulated ice coolers by car. Ice packs were placed in the bottom of the coolers and on top of the highest stacked clamshells containers containing blueberries. Fruits were selected based on their uniformity of size and colour. Rotten and damaged fruits were eliminated.