Canning tomato sauce for the refrigerator
As you state, you have not followed any canning procedures, so you don't get any more storage time than the standard recommendation.  Glass vs plastic doesn't  matter.  So, I would just recommend freezing.  Tomatoes, and tomato based sauces for that matter, freeze nicely. If you use freezer, zip-style bags, you can freeze them flat.  They will then thaw rather quickly.