A Glot-Up is type of dental equipment, something in between a mouth guard and an adult-sized pacifier

Pacifier

A pacifier is a rubber, plastic, or silicone nipple given to an infant or other young child to suck upon. In its standard appearance it has a teat, mouth shield, and handle...

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It was designed by an Acupuncture and Osteopathy Practice in Barcelona

Barcelona

Barcelona is the second largest city in Spain after Madrid, and the capital of Catalonia, with a population of 1,621,537 within its administrative limits on a land area of...

. It is an oral prottusor used mainly to treat TMJ

Temporomandibular joint disorder

Temporomandibular joint disorder , or TMJ syndrome, is an umbrella term covering acute or chronic inflammation of the temporomandibular joint, which connects the mandible to the skull. The disorder and resultant dysfunction can result in significant pain and impairment...

 (Temporo Mandibular Joint syndrome) because it relieves the tension from the jaw by replacing the grinding movement (Bruxism

Bruxism

Bruxism is characterized by the grinding of the teeth and typically includes the clenching of the jaw. It is an oral parafunctional activity that occurs in most humans at some time in their lives. In most people, bruxism is mild enough not to be a health problem...

or night bruxism) which often causes the dysfunction of the TMJ in the jaw.

It is also a tool for use in mobilising the SBS (Sphenobasilar synchondrosis) as the suction acts as a way to manipulate this bone at the base of the skull.