[ellard]

Reduce the quality/quantity of the existing product to keep the same price over time. Release another similar 'product', possibly under a different product name and/or brand with the original quality/quantity but at a higher price.

[Spivak]

The crucial part a lot of businesses miss is have some breadcrumbs for your most loyal customers to follow so you don’t lose them with the quality drop.

Don’t advertise it, just put it on your website where someone might be able to find it on Google.

[david422]

Ice cream containers always go down in size. Then they go up again advertising 30% more.