Evolution of Mortein mosquito repellant machines

Mortein started with this capped hut design for their mosquito repellent machines in 2005. 

This was later replaced by this red and white ball design which was aesthetically pleasing to the eyes.

 The third and latest design is this red and grey ball design with the addition of of a vaporizer control which allows users to reduce the emission of repellent liquid according to their requirements.

This compact design was introduced in 2017 and was the 3rd iteration

I noticed a slightly changed design of the Mortein mosquito repellent machine, which is the 4th iteration. It is similarly to the one above but without the red styling. The machine now bears an all white non-descript design. We can no longer change the vaporizer level as that functionality is not available in this edition. 

Update 8 July '16

Mortein has also changed the liquid bottle that comes with the vaporizer (shown below).

New

Old