Both the Fragonard and Molinard factories have "workshops" in Grasse. In other words, they have big gift shops hocking their wares. Plus, while they have been around for eons, the smells are not modern (they remind me of my great grandmother or bad vintage shops).
Unique Suggestions: I did find wonderful linen bags at one of the shops to put lavender in. I ended up purchasing lavender at the flower market in Nice and filling these bags to give as gifts.
Fun Alternatives: Skip the visit to Grasse.
8, place du Cours
You will know this place by the hoards of tourists milling about outside and the tour buses parked nearby. I love perfume and collect the perfume bottles but thought that this place was a rip off.
Unique Suggestions: I would choose this museum over the factory visits. At least this one claims to be a museum and is not an overgrown gift shop.
Fun Alternatives: If you do go to Grasse, visit the flower market.