A clean bag of water
It weighs no more than 300 grams, fits easily into a backpack and looks like any other plastic bag.
June 20, 2015
Girls today, pioneers in Stem tomorrow.
The Straits Times, Singapore
June 20, 2015
A clean bag of water
It weighs no more than 300 grams, fits easily into a backpack and looks like any other plastic bag.
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