This color change tells you that lemon juice has an acid in it. 7. Now, use the tip of a popsicle stick to add a very small amount of laundry detergent to the cup labeled Base and gently swirl to mix.

And if blue isn't your color, they also come in green and orange, and all of the colors are part of a larger collection of lemon-printed dinnerware. Other pieces in the collection include a dip ...