Food packaging and things like building materials are the most difficult.
There are certain things that I think make sense to buy new or 'lightly used' - if you're going to run a vehicle (bicycle, motorcycle, car, whatever) into the ground then you're getting full use of it; and cars, at least until they're almost completely useless and melted for scrap, have a decent ecosystem for second hand parts.
In some sense I think manufacturing has become too 'good' relative to human labour. We're throwing things away because it "costs more" to repair them.
But it doesn't really cost more - it just costs more in monetary terms because waste (both in manufacturing and disposal) is externalized.