Can I use a water purification straw during a ride? Ive seen some riders using these straws on long gravel or mountain bike rides, but Im not sure if theyre actually effective or just a gimmick. Do the filters in these straws really work on-the-fly, or do they just provide a false sense of security? Ive heard some arguments that the flow rate is too low to be practical for high-intensity rides, and that the filters can clog easily with sediment or debris. On the other hand, some riders swear by them for emergency situations or when water sources are questionable. Has anyone done any real-world testing or have data on the effectiveness of these straws? Are they worth the weight and bulk, or are they just a novelty item?