400ml Double Wall Stainless Thermos

Height 14.5 cm, diameter 6.8 cm, net capacity 400 ml. Fabricated entirely from certified 304 stainless steel — inner and outer layers mirror-polished for hygiene and longevity. Vacuum gap between walls minimises conductive heat transfer, improving thermal efficiency for both hot and cold contents. Leak-proof system comprises a precision-machined screw cap and compression-moulded silicone seal — validated through tilt-and-shake testing. Wide mouth (≥5.5 cm) enables easy addition of ice cubes or tea bags and simplifies manual cleaning. Tactile stripe pattern improves grip; non-slip base adds stability on laminate, glass or metal surfaces. Integrated lifting rope attaches discreetly near the shoulder of the cup.