FlameDisk uses ethanol as the main fuel ingredient. It lights instantly and burns for 30-40 minutes. This time is enough to grill food without any bad taste for 4 average adults. If you have more people you have to use more then one FlameDisk. It very compact and have a regular frisbee size and weight. It takes definitely less place in you car than big bag of charcoal. And my favorite turn around - no cleanup!