When I arrived at Harvard, the first thing I found strange was the thing on a people’s phone; cell phone wallet. I at first thought it was ugly, but after finding how useful it is, I decided to buy myself one.

This small wallet made with rubber can hold up to 3 cards and let you access to your credit card, ID, or other cards you use frequently in a daily life. There are so many kinds of cell phone wallet on amazon, but this is the cheapest and simplest one. High quality 3M adhesive on back of wallet attaches to any cell phone or case, and it is pretty sustainable and can lasts for over a year.