https://www.cnvacuumflask.com/product/stainless-steel-travel-flask/antislip-silicone-cup-sleeve-onetouch-popup-lid-stainless-steel-travel-car-cup.html

Design: Classic car cup, one-handed operation, one-button pop-up.
Capacity: 400ml, suitable for car and home use.
Material: stainless steel 304 material.
Anti-slip: The bottom of the cup is equipped with silicone anti-slip pad. At the same time, the cup body is equipped with an anti-slip ring, which will not slip on your hands or fall off.

At the heart of every stainless steel thermal travel mug is the material itself: stainless steel. Known for its resistance to rust, corrosion, and staining, stainless steel is a favored material in many industries, especially in kitchenware. When it comes to travel mugs, stainless steel provides several important advantages over other materials like plastic or glass.

Stainless steel is durable. Unlike plastic, which can crack or degrade over time, stainless steel mugs are highly resistant to wear and tear. This durability is essential for a travel mug that is exposed to constant movement, impacts, and a variety of environments. Whether tossed in a bag or knocked over on a table, a stainless steel mug is built to last.

Another important property of stainless steel is its thermal conductivity. The metal is a great conductor of heat, which is why it works so well in the design of thermal mugs. The inner and outer layers of the mug often feature a vacuum-sealed chamber that heat transfer, keeping hot beverages hot and cold drinks cold for extended periods.

One of the key elements of a stainless steel thermal travel mug is the double-walled insulation. The mug’s design typically includes two layers of stainless steel—an inner and outer wall—separated by a vacuum. This vacuum serves as an insulator, reducing the transfer of heat between the two walls.

For hot drinks, the double-walled insulation ensures that the heat stays inside the mug, keeping your coffee or tea at the desired temperature for hours. Similarly, cold beverages like iced coffee or water remain cool throughout the day, even on the hottest summer afternoons. The vacuum insulation means that the exterior of the mug stays relatively cool to the touch, even if the contents are very hot, which is a notable safety feature.