Miss Piggy is one of the Muppets promoting Lufthansa.

Lufthansa passengers will be treated to a Muppets-based gift as the airline and Disney start a new round of their campaign to promote the German premiere of Muppets Most Wanted.

Under the slogan ‘Join the Muppets. With Lufthansa’, employees of the family-friendly carrier will be handing out Kermit- and Miss Piggy-inspired sleep masks to passengers at the hubs in Frankfurt and Munich.

During the flight, younger passengers can look forward to Muppets presents, such as drinking straws, postcards and an activity book that gives them plenty of things to make and puzzles to solve, as well as pictures to colour in.

Of course, the in-flight entertainment includes the feature film The Muppets to get fans in the mood for the Muppets Most Wanted release.

On LH.com/muppets there are three online games to be played, each presented by a character from the film, and fans can send greetings cards from the Muppets to their friends.

Lufthansa also has plenty of prizes to be won. First prize is a trip for four people to Los Angeles with a visit to the Disney film studios, including flight, hotel accommodation and car hire.

At the heart of the new film is green frog Constantine, who is a dead ringer for Kermit, apart from a conspicuous mole on his right cheek. In contrast to his deadpanning doppelgänger, however, he is a nasty piece of work.

Constantine is the most dangerous criminal in the world, who has escaped from prison and now has a price on his head. While on the run, his resemblance to Kermit causes plenty of comical calamities.

What’s more, the villain could not have turned up at a worse moment, because the Muppets are just embarking on a European tour and travelling to London, Madrid, Dublin and Berlin to promote their new show.