I’ve had two of these, the first of which was branded to Camelbak. This could be me just getting used to opening the thing while cycling, but I bit through the valve. Gotta bite more gently when opening it, I guess. This style does seem to work all right, but I’m not sure I’m sold on the valve design.
Someone else asked for a gel recipe. Dave Everett at Cyclingtips did a short piece on home brew nutrition. He used honey and molasses for the energy gel. I think that’s close to a 1:1 ratio of glucose to fructose, so if you’re picky about that sort of thing, it may be worth doing more searching, but maybe it’s a start.
If you watch his Youtube vid, he’s Northern English. Some people have commented about his accent. It is what it is. You get used to it. We all sound funny to someone, etc.