So I got one of those blender bottles to make protein shakes, what do I put in it?

Benk111
So sometimes I might use it before a workout, but in also might use it in place of breakfast because I take college classes and it's quick meal, I can put it in my backpack the washe it when I get home. Also I have ADHD so it's hard to focus, so sometimes if I use electrolytes it helps me with that and I take medication for ADHD. Lastly I'm trying to eat healthier I'm not used to eating healthy food, I'm used to having junk food.
So I got one of those blender bottles to make protein shakes, what do I put in it?
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