Your brain is roughly 75% water, so it notices when you're running low, often before you feel thirsty. Research suggests that losing just 1–2% of your body's water can affect focus, short-term memory, mood and energy. That's easy to hit on a busy day, a hot commute or after a workout. The fix is simple: sip consistently, keep a bottle in sight, top up when it's hot or you're training, and make water something you actually want to drink. That's where air up comes in. Plain water, with a hint of flavour from natural scent. No sugar. No artificials. Just water. Save this for later and send it to someone who forgets to drink water. Sources: Armstrong et al., Journal of Nutrition (2012); Ganio et al., British Journal of Nutrition (2011); Pross et al., Physiology & Behavior (2014) #hydration #brainhealth #airup #drinkmorewater #wellbeing