TAP Air Portugal

Interesting construction: a plastic bag with a peel-off sticky paper tab at the top. Little diagrams on the bag show you how to use the tab to help you open the bag, and then to seal it closed again. One assumes from the instructions "para enjôo" and "for air sickness" at the bottom that you should throw up into the bag after opening it and before resealing it, though that isn't clear from the diagrams themselves. 

TAP Air Portugal (dark line)

The dark bar near the base of this bag (top right of this picture) is longer and broader than in the bag above.

TAP Air Portugal (tab on reverse)

Like the bag above, but no line on the bottom right. The oversize peel-off sticky tab is attached to the reverse of this bag.

TAP Air Portugal (tab on front)

...Unlike this one, where the tab is affixed to the front.

TAP Air Portugal (red tab)

Same idea as the bag above, but now with a bright red peel-off label.

Pedro César says that "Correio da manhã" (printed on the label) is a mass-circulation Portuguese tabloid newspaper. A new use for barfbags: advertising newspapers!

TAP Air Portugal (white tab)

Some well-meaning but misguided soul has handwritten some advice in German on this tab. It advises the reader to remove the peel-off label only after puking into the bag - otherwise the mess will stay stuck on the glued side of the label and the bag will stay empty. "You may as well puke onto a piece of sellotape and then roll it up", says this (clearly experienced) benefactor. 

Of course, any self-respecting bag-collector with more than three bags already knows this. But how many of the puking public do? Perhaps such advice could be printed on all bags, preferably in 15 languages?