For the technology geek who has everything, check out this Adjustable Temperature Smart Mug.
This mug is made to hold either hot or cold liquids, and it comes with a unique way to keep the temperature of your favorite drink perfect at all times.
Sync it with your smart phone to have Bluetooth enabled control of the temperature inside the mug using an included app that comes free with the purchase of the mug.
Whatever you set it to, the device will take care of the rest. Your drink will be exactly the way you want it every time, no matter how long it sits in between sips!