The frozen mochas at surfs up are THE BEST. Better then Starbucks if you ask me! And they don’t serve their coffee in styrofoam, so you’re safe, Robin .

HEALTH EFFECTS OF STYRENE: Once styrene gets into your food or drink—and then into you—what does it do? Studies suggest that styrene mimics estrogen in the body and can therefore disrupt normal hormone functions, possibly contributing to thyroid problems, menstrual irregularities, and other hormone-related problems, as well as breast cancer and prostate cancer. The estrogenicity of styrene is thought to be comparable to that of Bisphenol A, another potent estrogen mimic from the world of plastics.

THE OFFICIAL WORD ON STYRENE AND CANCER
Styrene is considered a possible human carcinogen by the World Health Organization’s International Agency for Research on Cancer.

Long-term exposure to small quantities of styrene is also suspected of causing:

low platelet counts or hemoglobin values;
chromosomal and lymphatic abnormalities;
neurotoxic effects due to accumulation of styrene in the tissues of the brain, spinal cord, and peripheral nerves, resulting in fatigue, nervousness, difficulty sleeping, and other acute or chronic health problems associated with the nervous system.
Because many of these effects can be more pronounced on developing bodies, extra caution is advisable for women who are pregnant (or considering becoming so) and for prepubescent children.