Love these. I bought two, and would do it again in a heartbeat. I use them for 2 tabletop fire bowls, which I made as follows:1. Buy 2 large mixing bowls (one at least 2" smaller in diameter than the other), Quikrete, and a small piece of 1"-diameter PVC (or any round material).2. Cut the PVC down to the same length as the thickness you want for the bottom of your fire bowl.3. Glue the PVC stub to the middle of the largest mixing bowl (this will leave a nice, round hole for you that you can push the propane pipe though; alternatively, you could drill the hole after creating the fire bowl)4. Spray the inside of the largest mixing bowl with oil or grease (I used olive oil), fill about halfway with concrete, and shake & stir vigorously to eliminate air bubbles5. Push the smaller mixing bowl down into the concrete until you hit the PVC stub at the bottom. Be careful to keep the smaller bowl centered. Put something heavy in or on the smaller bowl so it stays down.6. Leave overnight to harden.7. Remove the mixing bowls, and voila - you've got a concrete fire bowl. Repeat as many time as necessary.8. Drill a few small holes around the bottom edge of the concrete bowl to allow rain water to drain9. Drill one 2" hole in patio table per bowl.10. Center the bowl over the hole, and screw the Fire ring & propane pipe through, being careful to follow instructions on using thread tape, etc.11. Screw a disposable 1-lb propane tank (available at any hardware store) into the valve (it should be under your table). Open the valve and use a long match or lighter (like for a fireplace) to light up the inside of the bowl.11. Throw some rocks or colored glass in the bowl for some extra color and to improve the look.The final product looks great, and actually puts off a decent amount of heat. It won't keep your whole body warm, but is great for hands.