I think I read something once saying it's not good to mix up a whey shake and let it sit for too long, maybe it starts to break down, not sure. Would it affect it any to mix it up the night before, leave it in the fridge. It would sit for about 10 hours max.

I've "heard" that letting a whey shake sit for awhile is not a good thing. Milk curdles very quickly. The fridge may be a solid place to put it for a few hours, but what's the point? It takes 30 seconds to make.

Why would you have milk in the shake?

4 raw eggs+2 scoops whey+some water, that will last the whole day. Just give it a shake before you drink it.

Quagmire911 said:

Why would you have milk in the shake?

4 raw eggs+2 scoops whey+some water, that will last the whole day. Just give it a shake before you drink it.

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I don't understand the question.. why not?

I wake up at 6 tow rok out and leave at about 6:15. Id like to drink about half of the shake before I go but it would just be much easier to make it the night before. Im usually not motivated to do much of anything before the sun comes up.

Personally I make shakes every day for work and they don't spoil (although I do keep them chilled in a lunchbag with a cold pack in it, then in the fridge when i get to work). I also called and checked with customer service with whom I buy my protein from and they said it would be no problem as they said it takes a long time for their protein to break down (didn't give me exact figures). That said after I make my shake in the morn it gets eaten that day but usually 6-7 hours later and I've never had a problem.

Ingredients may be a factor however I'm not sure. As such I'll share what I usually put in mine:
1/2cup oatmeal, 3-4eggs, tsp psylium seed husk, & 2 scoops whey.

I also substitute veggies (carots, brocolli, or green beans) for the oatmeal when I work late tuesday nights.