abstract cover covered covering device discarded dose-delivery drug-delivery easy-to-use essential-care fine-points hollow-needles in-use injection-pen-needles injections medical medical-equipment metal multiple-daily-injections needle needles pen-needles penetration plastic plastic-caps plastic-hubs safety self-care self-treatment sharp sharps steel thin tips used aggregate appearance blue-metal chips coarse coloring colors colouring colours component constructed contours contrast contrasts decorative garden granite gravel ground-cover mulch path rough solid stone stones stonework surface surfaces texture textures attached background bright circles circular cloth color colour creased creases cushion decorated diamantes disk-shaped-beads displayed fabric fashion feel folds golden holes layers light metallic paillettes reflections reflective round sequins shadows shaped shapes shining shiny spangles sparkling stitched surfacing tactile textiles textured above angles arched arches architectural architecture bridge clouds curves dark drivers driving edge edges fabricated fabrication left-hand driving lines Melbourne open overhead patterns ridges roofing rows skies sky spaces stormy strips structure structured traffic vehicles Victoria visual weather Westgate Bridge winter flat blue sunny sunshine backdrop blended chair chairs colored coloured design details fine interconnected intermeshed interwoven layered linear lined mesh overlap overlapping overlay pattern patterned perspectives shape variation wallpaper weave woven