With a clear hopper, users can store more tobacco, reducing refill frequency
They cause many diseases, including cancer and heart disease
In fact, if lung cancer in never-smokers were considered a distinct disease, it would be the seventh leading cancer killer worldwide 1 (see 'Killing without smoke')
They have very long antennae that are longer than their bodies
Smoke from cigarettes, along with other harmful pollutants present in the air, build up and circulate throughout a home if nothing is done to remove them from that environment
Health, safety and regulatory points are checked against named UK authorities such as the NHS and MHRA, and a product is only ever called "less harmful than smoking" where a UK authority says so