A portable RO water can supply service is a reliable small business idea that can be started with an investment under ₹2 lakh. Many homes, offices, shops, and small commercial units depend on 20‑liter water cans for daily use, and the demand remains consistent throughout the year.

This business focuses on supplying purified RO drinking water cans on a daily or weekly basis. Customers can include households, offices, schools, clinics, and small restaurants. The setup requires an RO purification unit, food‑grade water cans, basic storage space, and a delivery vehicle such as a two‑wheeler or small van. Monthly subscription plans ensure steady income and repeat customers.

The investment mainly covers the RO plant setup, cans, and delivery arrangements. Profit margins are stable due to high volume and regular demand. With quality water, timely delivery, and good hygiene practices, this business can quickly build trust and expand to nearby areas without heavy additional investment.