Review on 🚰 Aquatic Way Bite Valve Replacement Mouthpieces (4-Pack) - Compatible with Camelbak and Most Brands | Includes Shutoff Valve and Tube O-Ring for Hydration Bladder and Backpack Water Reservoir by Derek Dolla

The first biggest problem with them is that you really have to bite down pretty hard and in the right place to get a flow. Camel bread rags are much softer and let through at least twice as much liquid. The second problem I have is that the notches holding the piece in the straw have to be slightly larger than the camel's because once I put it in the straw I can't put it back at all. This makes it very difficult to remove the bottle from the packaging. Third, a silly little problem - the yellow on/off valve is hard to move. It requires a little effort, which sucks when you run or bike. Little things that distract from what you're doing. All in all it works and it's not a bad product. There are only a few downsides. I'm hoping opening the bite valve outlet with a knife gives me more flow as I have to strain to get a drink when you're out of breath and exhausted, it sucks.