children still can access the content of such products (Assargaard and Sjoberg, 1995; Rodgers. 1996: Schmidt et al., 2004). In addi tion, it is known that the elderly population has great difficulty in opening CRPs (Nayak, 2002: Ward et al., 2010. Bix and de la Fuente 2012), and this problem may lead to inappropriate actions, such as transferring the content to an easy-to-open recipient, leaving the uncapped, or simply emptying the content into drawers or CRP bags (Winder, 2009) While there has been considerable research on specific aspects of the opening process of cRPs, to our knowledge, no studies correlate the packaging design. the gripping technique and the age of the subjects. This is important since these variables are factors that greatly influence the opening process. Therefore, this study aimed to assess the influence of the cap design, the prehension technique and the age in the torque transmission when opening squeeze-and-turn packages. This knowledge may benefit designers and manufacturers by providing biomechanical parameters to be used in the design of packaging that best meet users' abilities. needs and expectations, favoring the product ergonomics.