Niek has held the world record for the largest collection of air sickness bags since 1986. At the time of setting the world record for the largest collection of air sickness bags in March 2008 his collection included 5468 bags from more than 1066 different airlines.
Update for 2020. Niek Vermeulen still holds the record for the world's biggest collection of air sickness bags which now stands at 6200. The barf bag / motion sickness bag /air sickness bag collection includes rare items like the coveted Virgin Atlantic limited edition air sickness bags from 2004.

Parts of the aeroplane sickness bag collection which he has been collecting since the 1970's is on display in the Guinness Museums in Orlando and Las Vegas and in the Openluchtmuseum Arnheim. One of the most prized items in his collection is an airsickness bag from the NASA space shuttle Columbia which spent 16 days in space.
Not content with collecting just airplane sickness bags Niek also has a large collection of airline playing cards which is the largest of its kind in the Netherlands and most likely one of the 10 largest collections in the world.
Other Weird and Wacky Collections
World Record Largest Collection of Belly Button Fluff
World's Largest Collection of Apple Logo Collectibles
World Record for Largest Collection of Traffic Cones
Related Articles
World's Largest Barf Bag Collection
Air Sickness Bags Virtual Museum