Do you drink your hot coffee or tea through a straw to prevent staining your pearly whites? It might be time to stop. Plastic straws are often made with the chemical BPA, the chemical that has been phased out of food storage containers and reusable water bottles because of the possible link to endocrine disruption. Not all plastic straws are made with BPA, but since they are not marked with a recycling code, you can never tell. So it's best to skip using a straw -- they aren't eco-friendly anyway! -- and sip your hot brew from a reusable mug instead.