Urine collection systems, and methods of making and using the same

A urine collection system comprising:

• (I) a perforated sheet having a perforated sheet outer periphery, a perforated sheet upper surface, a perforated sheet lower surface, and a plurality of perforated sheet apertures (i) within the perforated sheet outer periphery, and (ii) extending from said perforated sheet upper surface to said perforated sheet lower surface;
• wherein at least a portion of the perforated sheet apertures within said plurality of perforated sheet apertures comprises a urine backflow feature that allows one-way urine flow through a given perforated sheet aperture, and prevents urine backflow through the given perforated sheet aperture;
• and
• (II) a bottom sheet positioned below said perforated sheet, said bottom sheet having a bottom sheet upper surface, a bottom sheet lower surface, a major surface portion extending within a plane containing said bottom sheet upper surface, and one or more grooves along a bottom sheet outer periphery of said bottom sheet upper surface,
• wherein each groove has a groove length GL, a groove width GW, and a groove depth GD that enables collection of urine by said bottom sheet.