the effect of diameter for lids with the same height and shape combinations.
The medium diameter versions of 7 (lids 2, 5, 6, 8, 9, 16, and 17) of
the 12 shorter lids (lids 1e9 and 15e17) and 2 (lids 13 and 19) of the
9 taller lids (lids 10e14 and 18e21) received significantly higher
ratings than the smaller diameter versions (p < 0.05)