Inspired by a cancer scare experienced by one of the founders, three men decided to do something to help men who are fighting testicular cancer. By purchasing a set of their Balls of Steel drink coolers, you’ll primarily be supporting the “Balls of Steel community. In the BOS community, men and their families struggling with testicular cancer are provided an outlet where they are able to seek emotional refuge and tell their story.” They also say that a “percentage of all net sales revenue go directly to Testicular Cancer Research.” The non-toxic, stainless steel balls require about 4 hours in the freezer, then they are ready to cool low-volume drinks without diluting them. Just place them in the bottom of the glass containing the drink, carefully swirl them around in the drink for a short while, then remove them before consuming the drink. The balls and a storage bag cost $19.99.