Installing a walk in glass block shower is one of the most affordable ways of doing a bathroom upgrade. You only need to purchase glass blocks and a glass block mortar to do the job. Prices of glass blocks vary, depending upon these following factors: glass block manufacturer, materials used, design and color. Pre-fabricated glass blocks are cheaper, and can be bought at discounts in home improvement stores. Custom-made ones are expensive; the upside of course is that you can dictate the material, design, size and color of your glass blocks.