About this 3D model

This is the first of 4 jars. I was asked to model some of these and this is an initial test of concept. The top of the 'lid' has a recess that should fit the top of the jar.I tried to make it a bit loose but I have not tested as yet. <b>I looked online at some more jars, and I think I will remodel the jar and make the cap have a tapering plug extending from the bottom instead of the current models scheme.</b>