Educational technical illustration for a 3D printing filament storage comparison. Side-by-side sealed dry boxes: left uses translucent silica gel beads with a hygrometer showing moderate-low humidity; right uses molecular sieve beads with a hygrometer showing very low humidity. Include filament spools inside both boxes. Clean engineering infographic style, warm off-white background, black and graphite boxes, subtle purple and yellow accents, no text, no logos, no brands, clearly illustrative rather than laboratory evidence.