I am proud of my insulator because it kept the hot water hot and warm.It also kept the thermal energy in the cup.One thing I would do differently is make a better lid and maybe put a hole for the thermometer.The hardest thing about the project was sketching the prototype because I had know idea what to do for the project.The quality on the cup was pretty good it stayed on and looks fashionable. A new skill I have learned is to not use to much hot glue because it will melt pretty fast.