There are a 'few' improvements among the horrendous examples. One brand of cookies Chips Ahoy has a simple pull-strip on top, with resealable tape that allows you to access contents over & over without ripping it apart.

Some of the CF light bulbs have snap-in plastic covers on their pachages which, although tight, allow popping it open, then resealing it.

I don't have time to list all the horror stories.