Aerobie

Its ring shape of only about 3 mm (0.12 in) thickness[1] makes the Aerobie lighter and more stable in flight than a disc.

Designed in 1984 by Stanford engineering lecturer Alan Adler, the Aerobie has a polycarbonate core with soft rubber bumpers molded onto the inner and outer rims.

The later introduction of the spoiler, which balanced the lift, made the ring stable "over a wide range of speeds".

[14] It can be easier to lose than a flying disc, especially over long distances and its low profile can make it hard to spot on the ground.

[10] The Aerobie is best thrown in a wide open area such as a football or soccer field, away from bodies of water, roofs, trees, roads, etc.

[9] The 13-inch (330 mm) Aerobie Pro was used to set the Guinness World Record twice for the "longest throw of an object without any velocity-aiding feature".

[15] The Aerobie's first Guinness World Record was set by Scott Zimmerman at 1,257 feet (383 meters) in 1986 at Fort Funston, San Francisco.

[16] The 1986 record was broken by Erin Hemmings with a throw of 1,333 feet (406 meters) on July 14, 2003 at Fort Funston.

Hemmings' Aerobie was airborne for 30 seconds (not an official measurement) and was the first thrown object to break the quarter-mile barrier (402 meters or 1,320 feet).