lass bakeware, such as Pyrex and Anchor Hocking, are staples in many kitchens. Their marketing touts how versatile they are, good for ovens, microwaves, and freezers. While hundreds of millions of pieces of glass cookware is used safely each year, a yearlong Consumer Reports investigation finds that it can shatter unexpectedly. Consumer Reports investigated 152 incidents that have been reported to the Consumer Product Safety Commission.