Reusable Storage Bags - with pinchpress™ seal , 7.25 x 7.5" (15oz) / 18.5 x 19cm (450ml), assorted colours, platinum silicone, BPA and BPS free. The first and only self sealing, airtight, non-plastic bag in the world! STASHER is the revolutionary alternative to plastic bags and containers. The innovative pinch press™ seal makes this bag airtight and leakproof. Ideal for food, travel, school and more. Made of 100% pure platinum food-grade silicone, STASHER offers all the ease and convenience of plastic storage bags, but without the harmful effects. Unlike plastic bags, stasher contains no petroleum, no PVC and no latex, so it's good for us and our planet. This easy-to-clean, reusable bag is freezer, microwave and dishwasher safe.