Buy a specially-marked bottle of Bayer HealthCare’s venerable brand One A Day multivitamin between September 16 and November 30 and you can redeem a code on the packaging or the store receipt at CaféPress.com and for $ 10 you get a semi-customized T-shirt with $ 1 from the sale of each T-shirt going to the Breast Cancer Research Foundation, up to a maximum donation of $ 10,000.How do I know this?