Marvin and Milo
Explore physics the exciting way, by trying out a simple and fun experiment. This month, Drinks Cooler Don't forget to check back next month for the next edition...
Drinks Cooler
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What you need
Two small plastic bottles
Kitchen paper
Sticky tape
Drinking water at room temperature
A breezy day*
*On a still day, you’ll just have to wait a bit longer.
Instructions
Fill both bottles with room-temperature drinking water.
Wrap one of the bottles in two layers of kitchen paper, holding it in place with sticky tape. Wet the paper with water.
Put both bottles outside in a breezy spot and leave them for 25 minutes before drinking.*
Results & explanation
Water in the kitchen paper evaporates, taking heat from the water in the bottle and cooling it. Any breeze speeds up the evaporation and hence the cooling.
Read more about evaporation on physics.org
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