Ro water under GST 18

Dear Sir,


A person have business of Ro Plants in villages who take the plants from Govt by contractor. Where community people collect the water from RO Plant. User/coustmer bring the plastic can,.bucket from his Home come to ro Plants and collect the water.No.invocie issued to user only one monthly can made validity of the card 30 days. from 1st to 30 user take 30 can per.month one can per day.
it's ro water under HSN code 2201 supply attract to GST 18% (where clear mention Sealed water and destiled water). Some time transport distributor water to community poeple,s home as per their requirements. can we treat as a plain water no sealed container it's loose water supply. in loose supply under HSN 2201 supply exempted. User taking Container from.his home. So please suggest can we show under exempted supply.