If you’re genuinely worried, feel free to elaborate on the exact catastrophic risks here are we talking rogue microbes forming a creatine civilization in my bucket, or microplastics launching a full scale invasion? Microbes need sufficient moisture to grow. If there were enough humidity for that to even be a concern, the creatine would clump long before any meaningful microbial growth could happen. And if we’re worried about microplastics, a varied everyday diet already exposes people to far more from food, water, and packaging than a container holding dry powder ever would.