Pyrex® Simply Store™ Glass Storage 4 Cup. Microwave Safe™. Limited two-year warranty. For more information, visit www.pyrexware.com or call 1-800-999-3436. Pyrex is a registered trademark of Corning Incorporated, used under license by World Kitchen, LLC. Simply Store is a trademark of WKI Holding Company, Inc., used with permission by World Kitchen, LLC. Reusable glassware. Longer lasting than disposable foil & plastic. BPA free. ©2012 World Kitchen, LLC.