Recreate only the insulin pen device from the uploaded reference image as a clean, editable SVG illustration for a clinical medication schedule app. Use the same visual language as the reference: a slim reusable insulin pen in horizontal side view, primarily white and very light gray, with delicate soft-lilac accents, thin gray outlines and a clean medical-instruction style. Create one single assembled insulin pen without its outer cap, based on the lower assembled device visible in the reference. The left side should show the narrow pen tip/needle-connection area but without a visible needle. Next, show a transparent cartridge holder with the insulin reservoir and internal stopper subtly visible. The right side should be a smooth white pen body with the soft lilac curved accent seen in the reference. The result must look like a medical insulin pen, not a writing pen, marker, syringe or electronic stylus. Requirements: editable SVG vector illustration one single object only horizontal orthographic side view transparent background slim and elongated medical device proportions soft white, light gray and pale lilac colors only thin elegant outlines minimal subtle shading cartridge window clearly visible clean silhouette suitable for a patient-facing healthcare app Do not include: protective cap visible needle text labels arrows measurements numbers dose dial details multiple views instructional layout blue body orange or red button logos or branding thick outlines dark colors cartoon style realistic photography marker pen or fountain pen appearance

The image shows a sketch of three pens on a white background. The pens are sketched in detail, with each pen having a unique shape and size. The colors used are mostly shades of blue, green, and yellow, giving the pens a vibrant and eye-catching look.