eko + co reusable freezer bags have easy to use locking mechanisms that keep food fresh and prevent odours from leaking into your freezer. They're made from a durable, BPA-free plastic that’s strong enough to survive bumps and scrapes, so you don’t need to worry about any leaks spoiling your day. This set is made from tough PEVA material which makes it a great alternative to regular Ziploc plastic bags. The PEVA bags won't break easily, making them reusable for a long time. They also feature double zip lock closure to offer airtight food storage and preventing any leakage of liquid food. eko+co. set includes: 2x reusable lunch bags (9” x 6.5”) 4x reusable sandwich bags (8.5” x 7”) 6x reusable snack bags (8.5” x 4.5”) sizes: small 250ml (8oz.) medium 600ml (20oz.) large 750ml (24oz.) all sizes are approximate measured with solid foods