Please choose the correct ending to complete the given sentence: Education and Communications: [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.

Ending1: 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. Ending2: What you need will depend on the size of the bottle or container that you are using, but a small bottle can usually work. [substeps] Plastic bottles are not very sturdy and are therefore potentially breakable. Ending3: You'll also need paper towels, the kind that you'll use to collect rice and pasta, and a pencil. [title] Line the bottle with newspaper or foil. Ending4: [substeps] You can also boil water on the stove to create the wave oil you want to use. You can also use paste paste and some paper to create the funnel.

Answer format: ending1/ending2/ending3/ending4