(no subject)

[http://users.livejournal.com/infekt_/]

so i apologize if this is a dumb question, but...

i've seen several people suggest using plastic canvas as lining on purses to help them keep their shape. my question is how would that work though when you're sewing the fabric around it? wouldn't a sewing machine needle not go through the parts where the plastic would be? i guess i'm just having trouble envisioning the whole thing.