I've used various sized Camelbacks for work and play for years... But then, I work in the desert too, so take that with a grain of salt. My CB Mule is frequently filled with ice and water in the mornings. I use it when wheeling my Jeep, I just strap it to the seatback. I use the Mule when hiking too. I also carry first aid stuff in the Mule's pockets. And sunscreen and pre-moistened wipes. I use a smaller one if spending a lot of time in a bucket truck bucket.