in the third week i bought a force resistance sensor (which came with a free pack of harribo) off the internet. this allowed me to start testing with different weights and drinks. i found that different drinks had different weights such as beer was heavier than water but not as heavy as milk. i also researched how much water the average male and female needed to drink. males need to drink around 3.7 liters of water a day and females 2.7. i also calculated how to convert resistance to weight.