Pink rubber Bracelets are intended to promote awareness for diabetes and breast cancer. The breast cancer awareness campaign has created the name hope bracelets for the pink bracelets. Hope bracelets are just one product sold to raise funds and awareness for breast cancer research.
Since there are only so many colors some colors are used for multiple awareness campaigns. In this case the pink bracelets are used for both breast cancer awareness and diabetes awareness.
Not all pink bracelets are awareness bracelets for breast cancer and/or diabetes nor do the profits all go to research. Some rubber bracelets are sold purely as a fashion accessory with no connection to a cause. Some colors are used to promote a sports team or organization such as a college or university.