question about interfacing

[xstillwaiting.livejournal.com]

Hi, I've been making totes and other types of bags in the hopes of starting my own little line and selling them. I've made a few already without interfacing, but I'm realizing that the bags would most likely be better with interfacing.

My question:

What type/brand of interfacing would you all recommend for totes and other handbags?

I checked the memories but couldn't find an answer.

All suggestions are welcome, and thanks to anyone who helps!

Cross-posted to sew_hip, & accessorydoctor.