CNWA (red/blue, flat base)

This Clean Bag from CNWA has what I guess is an address and a phone number on the back. Somewhere to send the bag after you've used it?

CNWA (flat base, serif)

Looks as if CNWA experimented with their design by printing a few bags in different typefaces and colour combinations.

This one has the "After use fold toward you" in a serif font. No address on the back, either.

CNWA (red/blue, pointy bottom)

One thing you can't accuse CNWA of is consistency. Tara Lewis sent me a shipment of six CNWA bags, of which five were different -- even allowing for the airline's sloppy printing practices. Here's the first: the equivalent of the red/blue bag above, but with a pointy bottom so it falls over when you put it on the floor.

CNWA (red/blue, blue rectangle)

There's a blue rectangle on the reverse of this bag near the base. That obviously makes it a totally, utterly different bag from the one above.