- 1). Clean out the soda bottle and remove the label. Make sure that if you use any detergent to wash the bottle that you rinse it out completely.
- 2). Fill the bottle with cooking oil until it is about 3/4 full. Fill the bottle the rest of the way with water.
- 3). Add 10 to 12 drops of your favorite color of food coloring. If you'd like to add a sparkly effect to your lava lamp, pour 2 to 3 tbsp. of glitter and sequins into the bottle.
- 4). Break up an effervescent tablet, such as Alka-Seltzer, and drop the pieces into the bottle. You can also use regular table salt instead of an effervescent tablet.
- 5). Secure the cap to the top of the bottle and gently shake the bottle until the small oil drops meld back into each other to form a large blob. Set the bottle onto a flat surface and illuminate it with your flashlight.
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