The property of a glass which could create a problem in the transportation of food and drink is that they are sensitive to heat. A glass has the tendency to break as a result of high temperature. When these small pieces of glass gets into the body system it is capable of tearing the soft lining of different internal body organs thereby causing damage to these organs.
Although humans learning something wouldn't general be considered classical conditioning but rather Cognition. That doesn’t mean they can’t “learn” via classical conditioning.
