I make individual servings of protein powder and dynamic greens for each day I'm on the road using 4oz plastic stackable containers from a grocery store. I've been doing this for 5+ years and have never had an issue with TSA, plus I can still buy the 5 lb containers of protein and have it saves time in the mornings during the week! Here is a link to one option - I have a Rubbermaid type that stacks and clicks together so I don't lose them in my suitcase

https://www.amazon.com/dp/B0012DMSTK..._QG3TvbQQ94K4B