Many people bring their own insulated flasks for drinks when they go out, the kind with an insulant (such as a vacuum) to slow the heat transfer between the contents of the inner container and the outer casing. Insulated containers vary considerably in prices and performances, and consumers often will compare the products in terms of temperature retention, spill-resistance, stability and durability, etc. before making a purchase decision.
Regions like the EU, China and Taiwan have introduced specifications for insulated containers. One of the most widely adopted is the European Standard, BS EN 12546 Part 1...[See PDF version for more information]