NPACK give some suggestions
there are many types of filling machine, piston filling machine, gravity filling machine, weighing and filling machine, overflow filling machine and so on.
1.viscosity of your liquid
2.corrosive
3.foamy
4.explosion proof
5.silk, and drops
a piston filling machine is the best choice of liquid are viscosity, such as shampoo, lotion, ketchup, sala Jam, oil.
if you liquid are thin like water and without corrosive but with foamy, you can choose a overflow filling machine or a volutric filling machine
you can reference to below chart:
