High-quality material: The fixed hamburger box is made of food-grade silicone. Retractable hamburger holder - Temperature resistance - 40 ~ 280 degrees centigrade, not easy to damage and deform. Product size: 10 x 6 x 5 cm, size after stretching: 10 x 9 x 5 cm, easy to carry. Hygienic and clean: The practical hamburger box allows you to enjoy juicy hamburgers, bagels, donuts. This hygienic and environmentally friendly BPA-free hamburger box keeps your snacks intact and sterile. It can be stretched to add meat pies and more filling, while the elastic gusset firmly combines the hamburger and filling. Easy to clean: Washable and reusable plastic hamburger box. This hygienic and environmentally friendly solution can keep your snacks intact and sterile. Not microwave safe.Ergonomic Design: U-shaped notch, cut-out center section exposes the maximum amount of food items to the user's bites while providing ample support. The flexible bottom can be squeezed or pushed up to allow biting off the last of the food without unnecessary contact. In the long run, it is more economical and environmentally friendly.Multipurpose Use: Practical and economical kitchen gadget. You can enjoy hamburgers, bagels, donuts at home, office, outdoor, sports, shopping mall, picnic, family gatherings and other places. Bring more convenience to your life.