[header] How to make a wave bottle [title] Gather the necessary materials. [step] Wave bottles are pretty easy to make and can be constructed from materials that you already have around your home. To make a wave bottle you will need an empty, clear plastic bottle, water, liquid oil, food coloring, a funnel, and hot glue. 
You can also include small toys/trinkets like googly eyes or beads to add to the wave bottle. [substeps] You can use baby oil, canola oil, or vegetable oil.