I am a flight attendant and am on the go a lot. Are there any flight attendants here? How soon did you go back to work? Do you have hunger cravings even while just on your protein shakes? Is it enough to hydrate off of? Are you able to get your water intake to stay hydrated by just sipping? What are the best bottled on the go protein shakes that dont have to be refrigerated that you like?

I am not a flight attendant, but there are a lot of protein shakes that do not need to be refrigerated before opening, and most are good for 2 hours after opening, before needing to be refrigerated.

Another option is to get a shaker bottle that has a bottom that screws off (usually marketed as a pill holder) it holds powdered protein very well and then you can just fill the shaker with water.

If you are only able to take a small amount of sips at a time, then only put a small portion of water and powdered protein in at one time (don't dump in all the protein and water at once).