Because size Matters the 20 gallon size has the extra capacity that fits 50% more trash which means less trips taking out the trash! It is the perfect can for the largest indoor trash bag in America! GLAD plastic step trash can offers protection of the lid and lid frame by inhibiting growth of odor causing bacteria for the life of the can. Keeping that bag slack out of sight 2-year limited We warrant your trash can to be free of defects in material or workmanship for two years, However some Exclusions apply. Damage to the product from accidents, misuse, normal wear or non-home use are excluded. The period begins from the date of purchase as shown on the proof of purchase. In the unlikely event that your product becomes defective, a repair or replacement will be provided at our discretion.