Intra-oral appliance; dental training device for teeth, tongues and facial muscles; medical device to alleviate or prevent snoring; dental device, namely, a soft flexible mouthguard like appliance that pulls mandible forward and optimises airways for breathing to assist with symptoms of sleep apnoea; chewable dental device for assisting with oral-facial development in children; chewable dental device that promotes optimal function of oral-facial area in adults; chewable dental device that promotes healthy development of teeth, lip and tongue strength in children; dental device that promotes nose breathing; dental device, namely, a flexible mouthguard-like device that reduces teeth clenching and damage to teeth; dental device with brush-like protrusions that assists with the treatment of periodontal disease; dental device that can assist with improved speech and oral motor function; dental device that can be used to assist in the treatment of tempero-mandibular joint dysfunction; dental device which has brush-like protrusions that can be used to assist in oral hygiene, being goods in class 10