Ziploc Quart Food Storage Freezer Slider Bags combine Power Shield technology with an easy-close slider for a convenient way to store your food. Made with an expandable bottom, these Ziploc bags offer a sturdy, puncture resistant base so you can stand and fill them with liquids, sauces, and other potentially messy foods easily. Power Shield technology uses durable BPA-free plastic for a strong, long-lasting bag with an easy-close sliding top for convenient opening and closing. Mindfully made to be reusable and recyclable, these storage bags are also safe for use in the microwave when used as directed. Ziploc plastic bags are perfect for storing fresh food items like fruits, vegetables, meat, fish, and cheese in the fridge or freezer.