A structure constructed from plastic may include one or more reinforcing portions that are sized and configured to prevent damage to the structure. For example, the structure may be a table top constructed from blow-molded plastic and the table top may include a body with one or more corners. The corners may include an interior portion and an exterior portion, and reinforcement portions may be sized and configured to help prevent damage to the corners of the table top. In addition, one or more depressions may be at least partially disposed within the reinforcement portions, if desired. The reinforcement portions, for example, may include one or more inwardly and/or outwardly extending portions.