Bodum have come up with an ingenious system for making milk froth, but using their standard plunger design and making a device that works on a pump action.  These can be used with both hot and cold milk, but should be used with caution when working with hot milk.

The big questions is how well do these devices work?

This product has received some excellent reviews and is very popular with over 80% of customers, but the biggest drawback for many of the customers was the designs where the beaker was made from glass.  Many people found that giving just that little bit too much pressure resulted in the  beakers breaking.

In some cases, customers have opted to using their bodums as the design and structure is very similar and as many of these are made from plastic and the glass ones are cheaper to replace than the milk frother ones, they are a handy substitute.

Another feature that some people found difficult to get around, was that when working with hot milk, it did occassionally build up pressure and spill out, making a hot mess.  Beware of this, but for cold milk frothing, it is a great tool.