I have been doing this for years and it works! Click the picture to find out how to do it and why it works
When finished with an empty cardboard salt container, cut the whole round top piece off and measure to fit a canning jar ring. Trace and cut with the flat part with scissors to fit a pint canning jar. Fill the jar with sugar, then cut a second one from a second empty salt container for non-dairy coffee creamer, spices, or flour. The pour spouts make for easy access to your sugar and creamer.