Non-spill drink-through lid

In an improved non-spill drink-through lid for use on a drinking cup comprising a lid having a central cover portion and a raised outer peripheral edge portion, said lid adapted to matingly engage the upper peripheral edge of a drinking cup so as to selectively maintain said lid in a covering relationship on said cup;

• a tab portion defined in said central cover portion of said lid, said tab portion selectively depressible so as to provide a drinking opening in said lid, said tab portion biased so as to selectively return to its normally closed position within the plane of said central cover portion upon removal of pressure thereagainst;
• and a hollow lip-engaging buttress member integrally formed in said tab portion, said buttress member configured to provide increased heat-dissipating surfaces thereon so as to insulatively engage the upper lip of a user drinking from said cup through said drinking PG,12 opening in said lid, said ridges comprising narrow raised portions which define corresponding pockets on the bottom surfaces thereof so as to provide increased heat-dissipating surfaces on said buttress so as to insulatively engage the upper lip of a user drinking from said cup through said drinking opening in said lid, wherein the improvement comprises:
• a raised retainer support wall defined in a chord position on said central cover portion so as to extend fully thereacross, said raised retainer support wall merging at each end thereof with said raised outer peripheral edge of said lid, said raised retainer support wall cooperating with said raised outer peripheral edge of said lid to define a well portion which encompasses said tab portion so as to retain excess liquid within said well portion.