 The most common method of glassing involves the attacker smashing an intact glass in the face of the victim.However, the glass may be smashed before the attack, and then gripped by the remaining base of the glass or neck of the bottle with the broken shards protruding outwards.Glassing is easily prevented by using containers made from plastic or tempered glass instead, but they suffer from unpleasant feel (plastic) and higher expense (for tempered glass).