A mechatronics engineer works to automate the transfer of materials and goods, and the manufacturing process. Their tasks involve identifying areas for task automation, designing, developing and testing potential mechatronic devices, and implementing design solutions.
A typical tea bag has somewhere between a gram and two grams of stuff in it. If the entire contents were nothing but fructose, and that fructose completely dissolved when you made your tea, you'd consume between 4 and 8 calories (carbohydrates contain 4 calories per gram) per cup of tea -- so that's the ceiling.
Boil fresh water and pour it over double the number of tea bags per eight ounce serving. Seep the tea bags for three to five minutes, remove then add ice to cool the tea. The one drawback with the hot method is hot water brings out the tannin in tea and can leave the tea tasting bitter.