Our project was about keeping the heat energy inside the cup/insulate the thermal energy. We had to make a design/model/prototype to test the temperature of the water. Our goal is to not let the heat get out of the cup. We are proud of the materials we used, it helped pretty much, we put five layers to make it keep itself warm. We might want to change the place you drink it, its not easy to drink.  (A big lips person cant drink water out of this cup.) The hard thing about this was we had to make the whole thing one piece which means that we have to connect the lid and the bottom to one piece. My comment about my cup is we might want to cut down the part up their to make it more easy to drink.  One skill I learned is we should keep as more layers as we want. We kept four layers layer 1 foil layer two cotton layer 3 foil layer 4 felt. This is our project, I sure think it is fun.