Storit Multi-purpose Jumbo Size 2.5 Gallon Storage Freezer Bag with Easy Slider (5 Bags Per Box) Multi-purpose Jumbo size for storage or freezer use. Seals tight, SUPER format! Easy to use -- just slide the bag close. For best results press air out of the bag before sealing. Microwave safety: For use in microwave, place a bag on a "microwave-safe" dish. Handle with care. Bag and contents may be hot. Do not overheat contents as bag may melt.