This clever tumbler idea from designers Jang Jin-Hee and Min-Jeong was born out of a mission to make people reconsider how much they use disposable cups. Just think how much material is being wasted on a daily basis as people all over the world take their lattes to go...

The tumbler isn't just a more eco-friendly way to drink your coffee, but it's also been built specially with Starbucks in mind so that when people order a coffee from their local shop a sensor is activated which slowly lights up more parts of the tumbler! What a nice little addition and a great way to encourage people to keep using it after the novelty wears off.

[Via Yanko Design]