water filter using bottles..

 https://www.youtube.com/shorts/MskWjuCA-3k?feature=share

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relation between hunger and large intestine.

we think hunger is related to only stomach.  but the hunger is also related to large intestines.  Large intestines are capable of controlling our hunger.  look at this "interconnected nerve cells lining the large intestine has a key role to play in food intake and its digestion. This enteric nervous system is now often referred to as the ‘second brain’. It is capable of directing messages to the brain as well as controlling the release of hormones that influence the movement of food down the gut, feelings of wellbeing and the sensations of being hungry or of being full."   source: https://www.sciencelearn.org.nz/resources/1832-large-intestine-function refer enteric nervous system (ENS) and neurogastroenterology for more information on communication that happen between brain and large intestine (gut)
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