Some of the packaging mistakes that I already encounter are:
1) Under-filled or over-filled bottle. Very common to softdrinks bottles. Maybe due to machinery’s fault. Getting a bottle with almost no head space is joy but getting one with not enough content is a shame. You gonna regret buying the commodity.
2) Contaminated / Adulterated Package. A beer bottle with cigarette butt, brown sugar with cane wood pieces, shrimp crackers with small stones. Incidence are result of improper GMP and HACCP implementation (Good Manufacturing Practices : Hazard Analysis and Critical Control Point). The two food safety measures should be implemented no matter how small your food processing business is.
3) Wrong Expiry Date Declaration. This thing happened to us once. The product ended up two months expired. It happened because the printer setting was adjusted by mistake. It was a disaster because the product arrived at destination. We recalled the whole batch and repacked with the right expiry date setting. We also promised to our client that the incidence will never happen again.
4) Declaring “No Preservative Added”. Some food manufacturers print “No Preservative Added on product label but one or more chemical preservatives are on ingredient list. Most customers are not stupid enough to believe such deceptive declaration.
5) Torn label or damage package. Result of improper handling or poor package design. As a manufacturer, you have to ensure that the product is well protected so that it is still in good condition before reaching the customer. No one are willing to buy goods with torn label or damaged package unless it is offered with discount.
6) Rich in Vitamin C Declaration. This vitamin is very sensitive to light and temperature. The claim might not be true when a buyer bought it from a grocery.
7) Two product in one. You are going to see this when buying candies and chewing gum. A result of faulty machinery.
Some mistakes are good but most are bad. Overfilling and two product in one are good on customers side. However, all sort of packaging mistakes should be documented and control measures should be implemented to prevent them.