This Instant Biodegradable Grill is made of 100% all natural materials. The single use grill is ready to go in five minutes with a simple design that retains heat for sixty minutes. The cardboard is lined with lava stone that both retains heat and reduces the risk of burns. It creates a high, even temperature that ensures your food is properly grilled, with a delicious, crispy finish. All natural materials - charcoal, lava stone, bamboo and cardboard. Easy to light and quickly reaches grilling temperature. Pure and simple.