The gas cylinder itself is made out of relatively good materials, very similar to those I bought at my local brick and mortar store a few weeks ago. Is the problem in the design? not a single person has tried to use it after they started! I say this for the sake of discovering or trying to discover. on the back of the spout where it screws onto the glass. the part that you have to remove each time to fill it like any other. There is a plastic latch that catches these grooves on the side of the spout. It took me five minutes, two hands, and a screwdriver to wring this piece out so I could rotate it. I could only move it half a turn before having to strain to turn it again. Now there is a way I would go through it every time I needed to fill it. For most people, this will be very difficult to use. for those who have even the slightest problem with manual dexterity, forget it. I ended up taking a grinder on the sides of the spout and removing those burrs as best I could. I also did my best to film this awful video. I can use it now, but it really annoys me that someone would sell something so poorly designed. NO, just say NO and find another gas bottle.
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