Only SharpStar containers have engineering controls that prevent overfilling, feature an anti-kickback lid design, and have a built-in safety mechanism that makes it tamper resistant, reducing accidental or intentional access to the container contents. SharpStar IV containers will accommodate 60cc syringes with a needle attached, blood transfer domes, needle counters, O.R. staplers, fistula needles, and other items to large for traditional in room disposal.