Received the bottle and hydration kit as a free add-on to a larger order. I'm a regular user (and big fan of) the Purist bottle (no leaks, best top, cool transparent strip to check drink levels), Skratch drink mix (excellent taste, not too sweet, keeps the bonk away) and SIS gels already so getting these in my Feed Box was a nice bonus.
I don't leave my house for a ride without SIS gels in my pockets. They go down easy, don't require a water chaser, have never caused any GI issues for me and if I do get some on my hands, they aren't super sticky and gooey like most other brands. Huge variety of flavors too. Salted Strawberry is my current favorite. I do wish they had a "leash" so I didn't lose the torn off top from time to time.
Appreciate the individual serving sizes of the Skratch for handy refuels during longer rides.