Obviously I was being sarcastic, but you're not going to develop a serious skin infection from mixing with plain bottled water lol.
This whole peptide-safety panic gets massively overblown by people with zero real-world experience of actual risk. I'm genuinely obsessive about sterility myself, using multiple syringes so my vials don't cross-contaminate my pharmaceutical-grade diluent, but deep down I also know you could let a vial sit untouched for three months, twist the top off, pour it into whatever cup's nearby, pull it into a syringe, and inject it, and the overwhelming majority of the time nothing bad happens.
People used to inject medications intravenously sharing a jug of filtered water strained through cotton. Sure, that massively raises the risk, but it probably wouldn't kill you outright. Honestly, you rarely get infected even from something like a barbed wire scrape or thorn puncture.
Even knew guys who mixed with puddle water. Another one who used vinegar for a completely different substance entirely. They're gone from this world today, granted, but back when I actually talked with them, they were still walking around just fine.