I was at the Self Reliance show and saw the Barocook flameless cooking system. I mentioned it here and @DKR said they were a common thing. So I bought one then another. I first purchased a Barocook from Amazon then bought a Trekmates flameless cook system from a local Army Navy store. My son had said that when he tried to do packet of mac & cheese from our food storage that it did not cook well. He thought maybe he did not let it cook long enough. So I decided to try them out and see which one I liked better. As you can see, the Barocook is tall than the Trekmates. These do come in all sizes but I got the medium size that holds 2 cups. The Trekmates came with a water measuring bottle but the Barocook quick lime packets have measurements on them so you know how much water to add. I tested it and the packet holds as much as the bottle so if you lose the bottle you will still know how much water to add. I will give the observations of each system: Barocook: *Taller *The cloth type casing only covered the sides *Bottom area is #5 plastic- polypropylene (PP). Common items produced with it include yogurt cups, medicine and ketchup bottles, kitchenware and “microwave-safe” plastic containers. Polypropylene is considered microwave-safe because it is heat resistant and therefore won’t get warped in the microwave. *Bottom area is higher then the wrap/cover and clear so you can see the steam and know your quick lime packet is still working *While cooking the Barocook had lots of steam escaping, almost whistling at times. I checked to make sure it was sealed properly and it was but still steam escaped. Also at one point water and some fluids were dripping down the side of the cook system, plus created a small puddle on the counter Trekmates: *Shorter but slightly wider *The wrap/cloth covering completely covered the bottom and sides *Bottom is made of #7 plastic- This category essentially means "everything else" and is composed of any new plastics, including bioplastics, and could also be comprised of different types of plastics. The use of plastic in this category is at your own risk since you don't know what could be in it. Polycarbonate falls into this category, including the highly toxic BPA. *The bottom did expand/warp while cooking making the system rock when you touched it. The bottom was also black plastic. *The system sealed nicely and some steam escaped but it did not puddle on the counter. We cooked the soup for 20 minutes. I stirred the soup mixture after 10 which I am glad I did because it was gummed up on the bottom. Both systems worked well but I was liking the Trekmates better. Less mess because it did not let as much steam out plus it was shorter and the whole base was covered, giving more insulation in my opinion. But I do not like the #7 plastic. It could be toxic and could become really warped over time. The Trekmates system after 2 uses already has a slightly bowed bottom and does not sit flat on a surface. They are great systems, very simple to use and easy to clean. I would recommend a flameless cook system. They are handy to have and kids can easily use them, no fire involved so it can easily be used inside a tent. The soup turned out great!