Ziploc® brand Freezer Bags with New Stay Open Design have a patented Stand-up bottom that makes them easy to fill, like having a free pair of hands in the kitchen. Microwave safe and BPA free, reusable freezer bags, Introducing Ziploc® brand Freezer Bags with New Stay Open Design – they stay open when you want them to, making them really easy to fill, almost like having an extra pair of hands in the kitchen to help you out, They’re easy to open and close thanks to Grip n’ Seal technology, which also helps to lock out freezer burn and lock in freshness so the food and treats you store taste great, The patented stand-up bottom lets you fill them with ease, making them great for handy freezer storage, while they’re also safe to use in the microwave and are BPA free