【VACUUM INSULATED TECHNOLOGY】 Features double-walled construction to maintain beverage temperature for hours while effectively keeping the exterior dry for a secure, condensation-free grip.

【EASY-CARRY LOOP DESIGN】 The integrated handle provides effortless portability for active lifestyles, fitting comfortably in hand or securing easily to travel gear and car holders.

【QUALITY CRAFTSMANSHIP】 Constructed with a 304 stainless steel interior to ensure purity of taste; the sleek matte exterior offers a professional aesthetic suitable for any modern environment.

· The working principle of the stainless steel thermos cup is to use its double-layer structure to form a vacuum-sealed space between the inner wall and the outer wall. This vacuum space helps minimize heat transfer through conduction, convection, and radiation, allowing the insulated cup to effectively maintain the temperature of the liquid inside.

· Conduction: The double-walled design of the stainless steel cup prevents direct contact between the inner and outer walls holding the liquid. Therefore, when two objects of different temperatures are in direct contact, heat transfer by conduction is significantly reduced.

· Convection: The vacuum-sealed space between the inner and outer walls of the cup eliminates air that would otherwise act as a medium for transferring heat through convection. Without a medium to transfer heat by convection, the rate of heat loss or gain is minimized, helping to maintain the temperature of the liquid within the cup.