- 1). Fill the soda bottle three fourths of the way full with vegetable oil.
- 2). Fill the rest of the bottle with water.
- 3). Add 10 drops of a dark food coloring to the bottle.
- 4). Break two antacid tablets into pieces.
- 5). Add the pieces one at a time to see the lava effect.
- 6). Top off the bottle with vegetable oil when all of the antacid has been used, and screw on the top.
- 7). Allow the lava to settle, then tip the bottle back and forth to see the waves that are created when water and oil are combined.
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