SC Johnson - A family company. Power shield technology. Stronger (Bag film tested using ASTM D1709 Dart Drop and ASTM D2582 PPT. Hefty is a registered trademark of Reynolds Consumer Products, LLC.) than Hefty on punctures & tears. Stand & fill. Microwave safe. Strong enough to use again. Fill, use, repeat. Stand & fill bottom for easy organization. A family company since 1886. Ziploc Bags are reusable after hand-washing and drying! We do not recommend reusing Ziploc bags after storing raw meat, fish, eggs, or potentially allergy triggering foods. Bags made with wind power. Environmental Facts: Bags are recyclable when clean and dry at drop-off bins at participating retailers. Please recycle this paperboard carton.