No abstract

Pop-top cans are simple to use because they do not require tools, but bring inherent problems with opening primarily for the older population. The development of different opening devices aims to improve accessibility for the older population by reducing the frustrations and discomforts associated with this style of packaging. A study of 24 individuals, showed different preferences in opening methods between older and younger individuals. Furthermore, determining time to open, EMG muscle activation, and wrist angle revealed that some objective measures related to subjective preferences. Younger individuals believed that the increased convince of a pop top, greatly outweighed any pain they had to endure. The elderly, however, preferred to use a simple opening device to transfer the movement away from the fingers to the wrist. Because of the reduction of precision movements, the elderly preferred to use the J-popper opening device. The difference in preferred opening methods between age groups shows that packaging designers must consider the needs of all members of the population.