Review on 🏃 HydraPak SoftFlask - Collapsible and Refillable Trail Running SoftFlask for Gel, Water, Electrolytes, and Nutrition: Stay Hydrated on the Go! by Adam Ross

This company makes the GU bottle but I like the GU specification a little more. I thought a round bottom (vs square) would be better but I don't see any difference in how it fits in my jersey pocket and the rounded bottom is harder to roll up (like a tube of toothpaste). Get a GU or Hummer. gel comes out. The main reason I like the GU bottle better is that it's thicker and softer. This bottle SEEMS (time will tell) that it will collapse at the end of the season for being so thin, although that may be a plus (weight) for some. This also means that the GU bottle has higher sidewall strength, which is important for handling the bottle during filling. I was planning on using this for Gatorade powder but ended up loading GU for long rides instead. Either that or the GU is pretty good so you can't go wrong with either, but the GU is slightly better for my use.