The mark consists of a cylindrical body with a circular top that includes four evenly spaced substantially hemispherical protrusions around a perimeter of the circular top, a fifth substantially hemispherical protrusion in the center of the circular top, and three cylindrical protrusions extending between two of the four evenly spaced substantially hemispherical protrusions, where the three cylindrical protrusions are smaller in diameter than the substantially hemispherical protrusions. A ratio of the height (as measured from the base of the cylindrical body to the top of the substantially hemispherical protrusions) versus the diameter of the circular top is approximately 95%. An antenna extends perpendicularly upward from the circular top and is included as a distinctive design element of the trade dress, rather than for its functional aspect. A small protrusion extends upward from the circular top proximate to the antenna but further away from the perimeter and further into the center of the circular top, the small protrusion being a temperature sensor that is included as a distinctive design element of the trade dress, rather than for its functional aspect. A sixth much smaller substantially hemispherical protrusion extends upward from the circular top between the fifth center substantially hemispherical protrusion and the middle of the three cylindrical protrusions, the sixth smaller substantially hemispherical protrusion being a temperature indicator that is included as a distinctive design element of the trade dress, rather than for its functional aspect. Two small holes in the cylindrical top are positioned on either side of the fifth center substantially hemispherical protrusion, the two small holes being holes for audible alert sounds that are included as distinctive design elements of the trade dress, rather than for their functional aspects. Writing around the cylindrical body and included by the three cylindrical protrusions is shown in broken lines to indicate that it is not part of the product design.

Color is not claimed as a feature of the mark.