A menstrual cup comprising: a receptacle having a resiliently foldable rim (1, 1a) defining a generally circular perimeter in an unfolded state, a sidewall having an inner wall surface defining a cavity therein, the cavity having a top portion proximal to the foldable rim (1, 1a) with a first opening and a bottom portion with a second opening, wherein the cavity is configured to collect a fluid; and an elongated stem having a proximal end and a distal end and an elongated middle portion therebetween wherein the elongated middle portion is configured to pass through the cavity and the second opening of the bottom portion of the receptacle such that the distal end extends below the receptacle; wherein the stem seats within the second opening to form a fluid seal therewith; and wherein the receptacle may have at least two positions: a folded position wherein the fold in the sidewall extends inward towards the center of the cavity; and a deployed position wherein the foldable rim (1, 1a) is unfolded such that the first opening of the top portion conforms to the generally circular perimeter of the unfolded resiliently foldable rim (1, 1a); characterized in that the proximal end of the stem is attached to the sidewall, wherein the manipulation of the distal end of the elongated stem applies a pulling force to the inner wall surface whereby a fold in the sidewall is created. a receptacle having a resiliently foldable rim (1, 1a) defining a generally circular perimeter in an unfolded state, a sidewall having an inner wall surface defining a cavity therein, the cavity having a top portion proximal to the foldable rim (1, 1a) with a first opening and a bottom portion with a second opening, wherein the cavity is configured to collect a fluid; and an elongated stem having a proximal end and a distal end and an elongated middle portion therebetween wherein the elongated middle portion is configured to pass through the cavity and the second opening of the bottom portion of the receptacle such that the distal end extends below the receptacle; wherein the stem seats within the second opening to form a fluid seal therewith; and wherein the receptacle may have at least two positions: a folded position wherein the fold in the sidewall extends inward towards the center of the cavity; and a deployed position wherein the foldable rim (1, 1a) is unfolded such that the first opening of the top portion conforms to the generally circular perimeter of the unfolded resiliently foldable rim (1, 1a); characterized in that the proximal end of the stem is attached to the sidewall, wherein the manipulation of the distal end of the elongated stem applies a pulling force to the inner wall surface whereby a fold in the sidewall is created. a folded position wherein the fold in the sidewall extends inward towards the center of the cavity; and a deployed position wherein the foldable rim (1, 1a) is unfolded such that the first opening of the top portion conforms to the generally circular perimeter of the unfolded resiliently foldable rim (1, 1a); characterized in that the proximal end of the stem is attached to the sidewall, wherein the manipulation of the distal end of the elongated stem applies a pulling force to the inner wall surface whereby a fold in the sidewall is created.