Flushing the toilet is a routine gesture we rarely question. Yet, each flush uses 3 to 9 liters of perfectly clean drinking water—just to remove a bit of urine. Multiply that by the number of flushes a day, and a single household can waste up to 100 liters daily—over 36,000 liters a year. Meanwhile, illions lack access to clean water. A simple, eco-friendly habit has emerged: “If it’s yellow, let it mellow; if it’s brown, flush it down.” Urine is sterile and poses no health risk if the toilet is cleaned regularly. Flushing less doesn’t mean less hygiene—just smarter habits. Keep odors at bay with essential oils like lemon or lavender, and clean the bowl every few days. You can also upgrade to dual-flush or low-flow toilets for better efficiency. If you share a space, be mindful—etiquette matters. Saving water starts with small choices. Why not make this one?