First and foremost, glass measuring cups, such as the 5% 20 oz version, offer a level of durability and reliability that is hard to find in plastic or other materials. Glass is non-porous, which means it doesn’t absorb odors, colors, or flavors from the ingredients you use. This characteristic is particularly important when dealing with strong ingredients like spices or food coloring. Unlike plastic measuring cups, which can become stained or carry lingering scents, glass measuring cups remain pristine, maintaining the integrity of your ingredients.