Variation factors df SS MS F P Resin 4 92855.04 23213.76 1181.17 <0.001* Common Beverage 4 185.66 46.41 2.36 0.054 Resin × common beverage 16 1352.73 84.55 4.30 <0.001* Between samples 225 4421.95 19.65     Period 3 13026.15 4342.05 2369.04 <0.001* Period × resin 12 2002.01 166.83 91.03 <0.001* Period × common beverage 12 136.65 11.39 6.21 <0.001* Period × resin×  common  beverage 48 731.75 15.24 8.32 <0.001* Intra samples 675 1237.16 1.83     *P<.05 indicates statistically significant difference.

Table 2: Three-way repeated-measures analysis of variance (ANOVA) for common beverages.