Postgraduate Natalee Ho, 25, used to think nothing of buying razors for women that came in pink or floral packaging, believing that these were specially designed to work better on her.

However, two years ago, she started using men's razors, which had similar features like the number of blades and a lubricant, and found herself spending $9 a month, rather than about $14 previously - which is more than 35 per cent less.