Future Essentials Freeze Dried Whole Blueberries#2. 5 Can 5 oz Product of the USA. 100% USA canned not available in any retail store in the USA. Freeze Dried Blueberries are produced in a process where moisture is removed from the frozen product using a very low temperature and a vacuum. Only about 3% moisture remains in the product at the time of packaging. The end product weight is reduced by over 90%, while the volume stays the same. This remarkable process concentrates the fresh product taste,