The problem was tryin to keep teacher’s coffee for a longer time. First through the define and inquire stage we decided what our prototype would look like what what materials would we use. Next throughout the develop and plan stage we hot glued every thing together and made it reusable and removable. Last we changed and added sth to our insulator to make the heat last longer.

Hot glue melt with hot water vaper easily. The evidence of this is every time when we take off the cap of the mug the hot glue melting everywhere on the mug making it poisonous to drink from. And I saw other group like this too their hot glue sticked to everything after 10 min. The reason is that the hot glue can not take like heat above 80 degrees and it melts

I am proud of what we did for the overall design, ever though we “failed” it was a fun experience and we learned sth. Next time we wouldn’t stick things with hot glue anymore because it melts easily. The hardest part is we didn’t have enough choice of materials and time so……