The efficacy value of the execution of the functions
for the bottle height was based on the
ability to completely hold the bottle; as a result,
the calculation was based on the width
of the palm of the left hand, which is mostly
used to hold bottles. As illustrated in Table 3,
the mean value of the width of the left palm
is 5.49 cm, and the corresponding standard
deviation is 0.57 cm. The calculated efficacy
value of the execution of functions for the bottle
diameter required to prevent children from
applying full force, while holding a bottle