She told viewers that she struggles with her hair when travelling to hot countries and joked that even boarding the plane to a humid country makes it frizzy. Another picture then showed how the tongs had styled her sleek and glossy locks.
In one sequence, the duchess said the product was available in "royal purple" - once again risking accusations she is trying to cash in on her past marriage.
After divorcing Andrew the duchess found success in America and once earned up to £2 million ($4.5 million) a year.
Following a number of commercial disasters in recent years, she has once again started using her name to earn a healthy income.
She is thought to have received a six-figure sum from mail order company Tristar Products to promote the Calista Perfecter on television and market it on her Duchess Discoveries website.
She has also made numerous appearances on US television to promote a £65 ($145.60) food blender, the Fusion Xcelerator, which she credited with helping her ditch her "fat frumpy Fergie" image.
During the TV appearances she candidly discussed her past weight battles while doing a demonstration on how to use the product.
- Daily Mail