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It's perfect for camping. All you need is

  • a smartphone
  • a flashlight app
  • a clear plastic bottle full with water

Step 1: Set up

  1. Fill a clear plastic bottle with water
  2. turn on the flashlight (app) of your smartphone
  3. put the water filled bottle on the flashlight of your smartphone

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nice and simple. don't use ice cold water as it may sweat.
<p>Nice and simple! Thanks for sharing!</p>
If you use different colored liquids or add food coloring it's adds a cool effect l as well.

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