Abstract: Disclosed are an intermittent-catheter assemblies and packages, carrying cases, and methods thereof. For example, an intermittent-catheter assembly can include an intermittent catheter and a catheter housing. The intermittent catheter can include a proximal piece (106), a cap (110) configured to cap a proximal opening of the proximal piece, and a catheter tube (114) fluidly connected to the proximal piece. The catheter housing can be around at least the catheter tube. The catheter housing can include a distal piece (130) and a collapsible sheath (148). The distal piece can include a lubricating means for lubricating the catheter tube when the distal piece is proximally slid over the catheter tube. The collapsible sheath can include a distal portion (146) coupled to the distal piece and a proximal portion (148) coupled to a neck of the proximal piece. An entirety of the catheter tube can be disposed in the catheter housing in a packaged state of the intermittent-catheter assembly.