The Tumbler is a taller version of the round bowl.
It is 100mm x 90mm and retails at $20.
The tumbler can be used as a handle less mug for tea or coffee (you just leave a space at the top of the cup so as not to burn your fingers). It can also be used as a water or juice tumbler or even a small vase. It would also look lovely with a herb planted in it (with pebbles in the base for drainage), sitting on your kitchen windowsill to be plucked from whilst cooking.
I use one at work to drink my coffee, it is certainly different to all the other mugs in the staffroom cupboard!
The tea and coffee stains wash off very well in hot soapy water or in the dishwasher.