Figure 1. The significant effect of the interaction between holes in teabags (triangles are teabags without holes, circles are those with holes) and tea type (green tea = green points, rooibos = orange points). Lines display fitted values from linear model outputs. Green lines are green tea, organe lines are rooibos, dashed lines are teabags with holes, and solid lines are those without. The ribbons show standard errors around model fitted values. There is clear difference in the response to having holes of the two types of tea: The green tea shows little difference between opened (ie chewed open) and unopened (ie intact) bags; the rooibos clearly shows more decomposition when the bags have holes.