A family company. Grip 'n Seal Technology: Unbeatable freshness. Microwave safe. since 1886. - Fisk Johnson. 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. Defrost & reheat-vent bag 1 inch. Environmental Facts: Bags are recyclable when clean and dry at drop-off bins at participating retailers.