I had the med. size pink tote and now I have exchanged it for a large size green one after seeing the color that a SA had its is a real pretty green the one reason I got the large is that the SA,s had a zipper- the large one and my med. had none! Now I see a med on eBay and it has a zipper does yours? another question do you think this is strudy enough for a smaller lab top even the med.? thanx for your help!