Iberworld

Advice not seen on any other bag: "Once been used, close by the dotted line and auto-stick on the adhesive paper having removed the protective paper. Open the bottom fold to get a bag with higher stability and better form." In English and Spanish.

No less than three dotted lines, two solid lines and a red tear-off sticky strip at the top of this bag. The reverse is depressingly plain white.

Iberworld (transparent strip)

Same as the loquacious bag above, except that the peel-off adhesive strip at the top is transparent, not red. One supposes that significant numbers of passengers failed to identify the hard-to-see strip on this bag, so it was replaced by a red strip, as in the bag above.

Iberworld's logo looks like a seasick starfish.

Iberworld (blue bottom)

Now has a broad blue stripe at the bottom to show the minimum amount the bag should contain.

Iberworld (tiny logo)

Iberworld's designers have obviously decided that small is beautiful.