Great idea! Reuse Salt Pour Spout With Canning Jars: 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 canning jar. Fill the jar with sugar (or salt or powdered non-dairy creamer if you use that). The pour spouts make for easy access to your sugar and creamer.