Simply re-posting your models with a few changes will not make them ‘solids’.
Your base, as posted in several threads previously, has almost 100 errors which need fixing before it’ll be a solid.
Your somewhat simpler lid has almost twice as many errors !
You seem to be somewhat oblivious of the basic requirements needed to create a manifold solid.
Despite many posts advising you on good practice…
This is perhaps evident when you still post your hopeful SKP files including guide-lines and dimensions, and without the geometry which you hope to be 3Dprinted not grouped [or in a component-instance].
If it’s not in a group etc then how do you know if it’s a solid ?
If you used Entity Info it would tell you if it were.
By taking your half-baked geometry to be 3d-printed it is all but likely to fail !
Wasting your time and your money !!
Please reread the various threads you have spawned.
They all offer sound advice on how to achieve what you want.
Ignoring good advice, and continuing down a flawed path is unlikely to ever give you what you want !