This cup purposely does not keep hot/cold for the same length of time as our drinking bottles - this means that your beverage will be ready-to-drink sooner. However, the CUP2GO is developed according to the same double-walled principle as our thermo drinking bottles. This means that it not only retains heat, but also ensures that the cup does not get too hot to hold.
If you have a start temperature of 90 degrees and put the lid on immediately, the temperature will decrease with around 10 degrees every half hour.