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A disposable lid for a drinking cup includes a cover portion having a generally circular periphery and a sliding member that is configured to slidably fit into a trench in the cover portion. The trench extends downwardly from and longitudinally along a top surface of the cover portion, and has an op

A disposable lid for a drinking cup includes a cover portion having a generally circular periphery and a sliding member that is configured to slidably fit into a trench in the cover portion. The trench extends downwardly from and longitudinally along a top surface of the cover portion, and has an open end at the periphery of the cover portion. The cover portion includes a drink opening on a bottom surface of the trench and adjacent to the periphery and a guide slot on the bottom surface of the trench. The sliding member includes a guide extending downwardly from a bottom surface of the sliding member so that the guide slidably fits into the guide slot on the bottom surface of the trench. The guide slot allows the sliding member to move between a first closed position and a second open position via the guide.

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What is claimed is: 1. A disposable lid for a drinking cup comprising: a cover portion having a generally circular periphery, the cover portion comprising: a trench extending longitudinally from approximately a center of the cover portion to the periphery and along a top surface of the cover portio

What is claimed is: 1. A disposable lid for a drinking cup comprising: a cover portion having a generally circular periphery, the cover portion comprising: a trench extending longitudinally from approximately a center of the cover portion to the periphery and along a top surface of the cover portion, the trench having an open end at the periphery of the cover portion, and wherein the trench comprises longitudinal side walls that extend downwardly and outwardly from the top surface of the cover portion such that a width of the bottom surface of the trench is wider than a width of an opening of the trench; a drink opening on a bottom surface of the trench and adjacent to the periphery; and a guide slot on the bottom surface of the trench; and a sliding member configured to slidably fit into the trench, wherein a width of the sliding member is greater than the width of the opening of the trench and less than or equal to the width of the bottom surface of the trench such that the sliding member is securely attached to the cover portion when the sliding member is in the trench, and wherein the sliding member comprises: a handle extending upwardly from a top surface of the sliding member; and a guide extending downwardly from a bottom surface of the sliding member, the guide configured to slidably fit into the guide slot on the bottom surface of the trench; wherein, the guide slot allows the sliding member to move between a first position and a second position via the guide, such that when the sliding member is in the first position, the sliding member covers the drink opening and when the sliding member is in the second position, the sliding member uncovers the drink opening. 2. The lid of claim 1 wherein the guide slot forms an opening at the bottom surface of the trench. 3. The lid of claim 2 wherein the guide comprises longitudinal side walls that extend downwardly and outwardly such that a width of a bottom surface of the guide is wider than a width at a top of the guide. 4. The lid of claim 3 wherein a width of the opening formed by the guide slot is greater than or equal to the width at the top of the guide and less than the width of the bottom surface of the guide such that the sliding member is securely attached to the cover portion via the guide when the sliding member is in the trench. 5. The lid of claim 3 wherein the guide further comprises front and back walls that extend downwardly and outwardly such that a length of the bottom surface of the guide is longer than a length of the top of the guide and the sliding member is securely attached to the cover portion when the sliding member is in either the first or second positions. 6. The lid of claim 1 wherein the guide slot forms an opening through the bottom surface of the trench, wherein the guide in the sliding member extends through the opening when the sliding member is in the trench. 7. The lid of claim 1 wherein the guide slot comprises a second trench extending downwardly from the bottom surface of the trench and extending longitudinally along the bottom surface of the trench, wherein the second trench is configured to receive the guide in the sliding member when the sliding member is in the trench. 8. The lid of claim 7 wherein the second trench comprises longitudinal side walls that extend downwardly and outwardly such that a width of a bottom surface of the second trench is wider than a width at a top of the second trench. 9. The lid of claim 8 wherein the width at the top of the second trench is greater than or equal to a width at a top of the guide and the width of the bottom surface of the second trench is greater than or equal to a width at a bottom surface of the guide. 10. The lid of claim 1 wherein the sliding member further comprises a nub such that when the sliding member is in the first position, the nub plugs the drink opening. 11. The lid of claim 10 wherein the cover portion further includes a depression in the trench that is configured to receive the nub when the sliding member is in the second position. 12. The lid of claim 1 wherein the cover portion further includes an annular side wall depending from the periphery and extending downward to a mounting portion for securing the lid to a cup, the side wall having a first height at a first point adjacent to the drink opening and a second height at a second point directly opposite to the first point, wherein the first height is greater than the second height. 13. A thermoformed plastic disposable lid for a drinking cup comprising: a cover portion having a generally circular periphery, the cover portion comprising: a trench extending longitudinally along a top surface of the cover portion, the trench comprising an open end at the periphery of the cover portion and longitudinal side walls that extend downwardly and outwardly from the top surface of the cover portion such that a width of the bottom surface of the trench is wider than a width of an opening of the trench; a drink opening on a bottom surface of the trench and adjacent to the periphery; and a guide slot on the bottom surface of the trench; and a sliding member configured to slidably fit into the trench, wherein a width of the sliding member is greater than the width of the opening of the trench and less than or equal to the width of the bottom surface of the trench and wherein the sliding member comprises: a handle extending upward from a top surface of the sliding member; and a guide comprising longitudinal side walls that extend downwardly and outwardly from a bottom surface of the sliding member such that a width of a bottom surface of the guide is wider than a width at a top of the guide, the guide configured to slidably fit into the guide slot on the bottom surface of the trench, wherein a width of an opening formed by the guide slot is greater than or equal to the width at the top of the guide and less than the width of the bottom surface of the guide; wherein, the guide slot allows the sliding member to move between a first position and a second position via the guide, such that when the sliding member is in the first position, the sliding member covers the drink opening and when the sliding member is in the second position, the sliding member uncovers the drink opening. 14. A thermoformed plastic disposable lid for a drinking cup comprising: a cover portion having a generally circular periphery, the cover portion comprising: a trench extending longitudinally along a top surface of the cover portion, the trench having an open end at the periphery of the cover portion; a drink opening on a bottom surface of the trench and adjacent to the periphery; a guide slot that forms an opening at the bottom surface of the trench; and a depression in the trench; and a sliding member configured to slidably fit into the trench, wherein the sliding member comprises: a handle extending upward from a top surface of the sliding member; and a guide extending downwardly from a bottom surface of the sliding member, the guide configured to slidably fit into the guide slot on the bottom surface of the trench, wherein a width of the opening formed by the guide slot is greater than or equal to the width at the top of the guide and less than the width of a bottom surface of the guide; and a nub that protrudes downwardly from the bottom surface of the sliding member; wherein, the guide slot allows the sliding member to move between a first position and a second position via the guide, such that when the sliding member is in the first position, the sliding member covers the drink opening and when the sliding member is in the second position, the sliding member uncovers the drink opening and wherein the nub plugs the drink opening when the sliding member is in the first position, and the depression in the trench receives the nub when the sliding member is in the second position. 15. The lid of claim 1 wherein the guide comprises longitudinal side walls that extend downwardly from a bottom surface of the sliding member such that a latitudinal cross-section of the guide forms one of a rectangle, a square and a trapezoid.