Hi, I need to build a homemade thermos for my grade 7 heat project. I was thinking of using a plastic water bottle as the container, and then put cotton pads and tin foil around it. But I don't think that will suffice to keep it warm long enough. does anyone have suggestions. The project is due soon so please help.
NOTE: The Cotton pads will have "air pockets that will reduce convection,then I will wrap them in tape and attach the tinfoil so it will reduce radiation and the insulation I add will reduce conduction. Please correct me if i'm wrong.
