Which protein are you using from them?
I use a variety of proteins from a few sources. In my closet right now are:
Nutribiotics Vegan Rice Protein (chocolate and vanilla)
ON Gold Standard Casein (chocolate and vanilla)
ON Gold Standard Whey (chocolate)
...and the generics from True Protein:
Milk Protein Isolate (unflavored)
Gemma Pea Protein (unflavored)
In the past I've used the cross-flow microfiltration whey, also unflavored, and chocolate flavored hydrolyzed whey. I dropped those because I find the ON Gold Standard Whey gets me the same results (compared to the CFM) or better (compared to hydrolyzed whey) in terms of how I feel after I drink them post-workout.
I tend to rotate and mix my protein around, and I'm trying the gemma pea protein now because the Nutribiotics rice protein doesn't mix well. So far, so good on the pea protein.
Seems I can cut my protein cost in half by using trueprotein. It would take me a while to go through 25 lbs though.....I assume the stuff won't stale/go bad. ?
It hasn't gone bad on me. I just stick it in my old Muscle Milk and ON containers, or tupperware or rubbermaid containers. Or I just pour some out and re-zip-tie the big bag it came in until I need to re-fill a smaller container.