Effective Marketing Channels for a New Water Brand Launch

I’ve previously been on the frontlines selling an AI B2B SaaS product with my colleagues. Honestly, it was just another typical AI tool for blue-collar trades, but that experience made me realize something important—brand awareness really matters when you first introduce yourself to users. I had tried running email campaigns and a few other things, but quickly saw that emails alone weren’t enough—most people don’t even open them. That’s why I’m now trying to understand general marketing better. So here’s my question: if I were to launch something as simple as a water brand today—but positioned in a sleek, aesthetic way—what channels would be most effective to stand out and potentially outsell competitors? Should I focus on Instagram, Facebook, online communities, or somewhere else? I’m especially interested in strategies around design fundamentals and those smaller, high-impact tactics that really resonate with an audience. Would love to hear how you’d approach this.