I know many farms right from Wayanad to Trivandrum in Kerala and some farms near Dindugul, Palani, Raasipuram,Salem,Erode,Coimbatore in TN. Most of the farms dispense milk in vessels bought by the buyer or dispense milk to houses in unsealed bottles. If you wish to seal, then that milk must be pasteurized and needs to follow many conditions like printing the name and address of the seller, MMPO licence no., you need to mention the fat and SNF of the milk in that packet, measurement of the packet etc.
For a small farm, this is not required if they dispose it as fresh milk, in loose. No headaches.
I have seen myself farms selling milk when the milking is on and the buyer’s bring vessels themselves to collect milk. For a farm size of say 10 cows, maximum could be around 100-150 litres in the morning.Once milking is over their milk is sold out too. So no headaches on storage and preservation too. This can be sold in the neighborhood itself. Packing attracts lot of unnecessary headaches from law enforcing authorities, weights and measures dept, quality control dept etc.
Why take unnecessary headaches. Your focus from producing milk will slowly be diverted to milk processing and distribution. Why you worry when fresh milk can be sold close to Packet milk price or make more money by selling Curd, Ghee,Butter, any milk based sweets. More margins you get.