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It’s aweful for travelers in desert searching for water source. Given that cactuses are relatively easy to find. So we design a cactus straw which can filtrate cactus’s fluid in order to get drankble water for desert travellers. When using, people just need to thrust the straw into cactus and suck. Besides, it can store some fluid as well.
Lee Owen YE Feng Ying Zhihan Sanders Lee