Real-Time Temp LCD Vacuum Insulated Cup

350 ml volume; dimensions 8.5 × 19.5 cm; weight 380 g. Inner chamber: 304 stainless steel (EN 10088-1, nickel-chromium composition 18/8); outer shell: 201 stainless steel (higher manganese content for improved hardness). Vacuum gap: 0.45 mm, maintained via copper gettering during sealing. LCD module uses industrial-grade glass substrate with anti-reflective coating — legible at 45° viewing angle and under fluorescent office lighting. Temperature sensing uses embedded platinum RTD element (Pt100 class B), sampled at 2 Hz during display activation. Hot retention test: filled with 95°C water, sealed, placed at 20°C ambient — recorded 65.3°C at 6h mark. Cold retention: 4°C water → 9.7°C at 12h. All tests conducted per UKAS-accredited lab protocol aligned with BS EN 12546-2 Annex A. Exterior polish meets BS EN ISO 15730 for specular gloss (≥520 GU at 60°), ensuring consistent reflectivity and premium perception. Used across UK sectors: NHS frontline staff verifying safe drink temps pre-shift, university students tracking hydration during lectures, remote developers avoiding caffeine crashes via timed sips, and eco-shoppers fulfilling Plastic Packaging Tax reduction goals through reusable adoption.