Steel Boy Thermal Mug 400 ml – Black
Black thermal mug with a capacity of 400 ml is a practical solution for those who want to have their favorite drink always at hand - on the way to work, university, while traveling or during outdoor activities. The classic color scheme and simple form make it fit any style and look good in both urban and off-road environments.
Durable 304 stainless steel
The body is made of damage-resistant 304 stainless steel, valued for its durability and corrosion resistance. The material used does not absorb flavors or odors, so beverages retain their properties even with frequent use and changes in content – from coffee to tea to cold drinks.
Double walls and vacuum insulation
The mug features double walls made with vacuum technology, which provide very good isothermal properties. This design helps maintain the temperature of the beverage for a longer period of time, while limiting the heating of the outer surface when carrying hot liquids.
Leak-proof lid with drinking hole
The lid with a drinking hole increases the convenience of use and helps reduce the risk of spilling the contents during carrying. This is a practical solution when walking, driving or stopping in the field – the drink is better protected and the use of the mug remains fast and comfortable.

Main features
- 400 ml capacity ideal for coffee and tea
- durable 304 grade stainless steel
- double walls with vacuum technology
- material does not absorb flavors or odors
- leak-proof lid reduces the risk of spills
- drinking hole in the lid
- comfortable handle for easy carrying
- resistance to damage in the field
- compact size for everyday use
- universal design goes with everything
Application and activity examples
Survival expeditions and bushcraft: During field trips, it is important to have equipment that can withstand intensive use and provide predictable performance. The sturdy stainless steel construction and insulated walls make the mug ideal for camping conditions, allowing you to comfortably enjoy hot or cold drinks even during long hours of activity.
Everyday use in the city: The mug is perfect for the morning commute to work or school, as well as for walks or shopping trips. Its compact size makes it easy to carry, and the lid helps secure the contents, reducing the risk of accidental spills in your car, backpack, or bag.
Technical data
Color: Black
Capacity: 400 ml
Material: 304 stainless steel
Dimensions: 100 x 78 mm
Weight: 183 g