Once cans leave manufacturing facilities, the distribution, storage and retail conditions present opportunities for can tops to become soiled. I have often thought there should be a way to ensure sanitary enjoyment of soda from cans, and in the near future, this may be a reality. Cali St. John, an entrepreneur from Florida, has patented an inexpensive, consumer-removed, thin, clear and flexible plastic film that’s completely biodegradable. In addition, the film can be printed on, which presents merchandising, or promotional opportunities for beverage manufacturers. 300 billion cans are produced worldwide each year, so this a potentially huge opportunity.