What size water bottle should I get?

The ideal size depends on your lifestyle. 500ml bottles are perfect for short outings, fitting easily in small bags and cup holders. 750ml bottles offer the best balance for daily office or school use, providing adequate hydration without being bulky. 1-liter bottles suit those with higher hydration needs, outdoor activities, or longer periods away from refill points. Consider how often you can refill and how much you typically drink.