How to model a blister package

[neo0.]

Ive been using this prog for years and its just this one thing that seems to be giving me a hard time..

[Woodie]

There are no holes in wings. All models are closed. What you probably did was to use intrude. Did you actually looked at the model that I provided? I you have separated model for top part (transparent plastic) and bottom (aluminum foil) then there is no closing holes. You just model the bottom part using the same principles.
If your model is in one piece then you should not use intrude.
Check again my model.

[neo0.]

I didn't intrude, I moved and scaled faces on the top and the bottom.

[Woodie]

Well, you were not suppose to do that for the whole length of the process.

4. select the top and bottom faces and use "Inset"
5. Select the top inside faces and Extrude by normal (Separated not Region)

I thought it was obvious that you were suppose to deselect all faces at the end of 4.