Reusable Sandwich Bag, with pinchpress™ seal , 7.25 x 7.5" (15oz) / 18.5 x 19cm (450ml), sky, platinum silicone, BPA and BPS free. STASHER is the revolutionary alternative to plastic bags and containers. The innovative pinch press™ seal makes this ba g 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 i s freezer, microwave and dishwasher safe.