Saving money for Indian Middle class family buying tips

For Indian Middle class family...
1. Buy 500 ml or more for any item instead of buying 50 ml, 100 ml .
example:
Buy Dettol 500 ml cost Rs.58
Dettol 100 ml cost Rs.15.
for 500 ml = ( => 5 *100 ml = 500 ml = 5*15 = 75)
Savings 75-58 = Rs. 17
2. It holds for all other items like hair oil, toilet cleaners, soaps, baby items like baby powder, baby soap, baby oil etc etc2.
3. For hair oil, don't buy bottles. Buy bottle once, and then buy refill packs, which saves you lot of bucks.
Example:
Johnson baby oil - 50 ml - bottle - Rs. 42
Johnson baby oil - 50 ml - pouch - Rs. 21
Savings by buying pouch = Rs. 21