Create list of lists from Groupedby dataframe in Pandas

Question

Assume my df is as follows:

df = pd.DataFrame({\'Order ID\': [1, 1, 2, 3, 3, 3, 4, 4], \'Product\': [\'USB\', \'Bat\', \'Ball\', \'USB\', \'Phone\', \'Toy\', \'Bi