Water + Milk

Divya, a milkman’s daughter is very smart. There were two containers A and B. The container A had 1 liter water and the container B had 1 liter milk. Divya took 350 ml from cointainer A and poured it into container B and stirred well. Now she took 350 ml from the container B and poured it into container A and stirred well. If the whole thing aforementioned is considered a process, she continues the process for 21 times.

Which of the two ratios is greater:
milk:water ratio in container A or water:milk ratio in container B?