Several embodiments of plastic dumpsters with improved strength and durability are disclosed. In one embodiment, gussets connect pockets to bevel walls, connecting the side walls to front and rear walls of the dumpster. The bevel walls are stronger than the side walls of the dumpster. Other embodiments disclose gussets integral with front and rear walls of the dumpster for improved strength. Other embodiments disclose removable, separately formed sleeves that are secured to the sides of the dumpster to form pockets for receiving the forks of a truck.