Just finished my second cross country roadtrip with the Thirsty Rock bag. Having constant ready access to water was a game changer. The last day was a. Barn burner from Ames IA to Denver in 105* plus heat, and the “Rock” never faltered. Filled it with ice in the morning, and again in Kearney NE. So nice to have cool water on demand. Bought mine after seeing it at the National Road Glide Rally in Tahoe, and don know how i rode without it before. A lot easier with a modular helmet, bur having fluids in the heat is critical. Best addition i have made to my rig.