If you need to narrow down your choice to a practical thermo mug for the city, the KeepCup Helix Thermal Gloaming M will meet the basic requirements. Its fully sealing twist-fit double-lock lid minimizes the risk of spillage while being easy to disassemble for cleaning. The double stainless steel design ensures insulation: approximately 1 hour of heat and up to 6 hours of cold, which will cover normal daily operation. The design is designed for comfortable everyday use — quick folding and easy maintenance will be appreciated by those looking for a reliable, undemanding thermo mug.