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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

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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