My product is a straw that can filter out little sediments in your tap water. It is tested, and it in fact DOES work. I tested it myself. YOu can use it as a normal straw. It has a built-in 3 oart water filter. Please put your feedback for this invention in the comments below. OKOK so the invention convention is in a week and im super excited and stuff. This is my invention hopes you like it. I do have a google form if you would like to fill it out, just message me about it :D