Hi, Kooba lovers - I was wondering if any of you could help give me some ideas. I would love to get my sister a Kooba (or maybe another nice designer) for Christmas, because I know she would never get something like that for herself, but would really enjoy it! She is 30 years old and an elementary school special education teacher, and she carries a _ton_ of stuff in her purse (she somehow always has absolutely random things like batteries and even once a screwdriver!). The kicker is she can be kind of rough on things sometimes, and definitely won't be one to baby a bag, so I think a really delicate leather or suede would be out. I was thinking a Sienna, because they are huge and classic, and because I think she would appreciate the sort of bohemian vibe, but she might prefer a zipper closure to minimize things falling out. Any ideas?