Meet frank green’s all-new Glow in the Dark Range — charge by day, shine by night. Glow brings the fun back to hydration — don’t just hydrate, illuminate! Choose from three fresh, curated colours in frank green’s most radiant range yet. For best results, place your bottle in direct sunlight for around 30 minutes to help it charge — it’s the most effective way to activate the glow. Indoor light can work too, but results may be softer.