My folks were so used to my individual tarts they were kinda put off by the clam shells when I tried them briefly, and honestly, I could SMELL the plastic after I poured them, never knew if it was me and my nose or what, but they just didn't fly for me... When I poured straight par tarts, they didn't smear at all in the cello bags, it was great, those suckers were strong and held up nicely! But I am using KY's 50/50 blend now, and you're right, you do have to be much more carefull handling them once they're bagged... The upside is no re-pour!!!