California Proposition 65

Different parts of the world (and different states within countries) have different regulations on the use of BPA in plastics. BPA has been highly studied and scrutinized by many governments since about 2008. France has banned BPA in food packaging. After hundreds of studies, the United States Food and Drug Administration says BPA is safe at the low levels in some foods. But, California lists BPA as being toxic to the female reproductive tract under its Proposition 65 rule that requires manufacturers to warn consumers if certain chemicals are in their products. The European Chemicals Agency said that BPA should be listed as a substance of high concern in 2017 - based on the toxicity for human reproduction. That means the European Union could be taking steps to restrict the use of BPA. They, along with Canada, have banned BPA in baby bottles for safety reasons. You can’t make baby bottles, sippy cups or canned infant formula with BPA in the US either as of 2010.
RADIUS products are BPA-free.