Instead of numbers write the color word on the bottles. Sort pom-poms by color. Empty each bottle and count the pom-poms. Then record how many pom-poms were in each bottle. Add the two colors together for addition practice.
A Place Called Kindergarten: math.love this as a center for sorting shapes! (Could also make shape mats all white or black so the children are only using the shape without the color cues after they master it with colors)