Patent ID: 7658887

Claim:
A pipette tip grid assembly, the assembly comprising: a base including a bottom, a sidewall extending from the bottom, and an interior ledge extending from an interior surface of the sidewall; a first detachable pipette tip grid having a top side and a bottom side, the bottom side including a bottom edge that rests on the interior ledge of the sidewall of the base, the first detachable pipette tip grid including a plurality of holes for receiving pipette tips, the first detachable pipette tip grid configured to support a pipette tip received in a hole of the plurality of holes, wherein a bottom part of the pipette tip protrudes from the hole toward the bottom side, and wherein the bottom side is enclosed by the sidewall of the base; a detachable stacking layer that rests on and encloses the top side of the first detachable pipette tip grid; and a lock mechanism coupled to the first detachable pipette tip grid that releasably attaches to an exterior surface of the sidewall of the base, wherein the first detachable pipette tip grid can detach from the base without removing the detachable stacking layer.