I know this is an old post, but please don't fall for these scams. This set-up, with no drain hole nearly guarantees soil saturation at the pot bottom which in most cases would prove to be deadly; and it does ensure a build-up of dissolved solids (salts) from your tapwater and fertilizer solutions ...... and you'd better be using a fertilizer with an NPK ratio that closely mimics that at which the plant absorbs the nutrients or else the nutrient ratio will quickly become skewed enough that antagonistic (nutrient) deficiencies would have you pulling your hair out. This is a fundamentally poor idea ..... and I put the Ups-a-Daisy pot inserts in the same category.
Al
