If you're like us, your West Loop travel mug probably goes everywhere with you. Make it easy on yourself by having an extra BPA-free Contigo replacement lid on hand in case you forget yours. The West Loop replacement lid is spill-proof and fits all sizes of West Loop travel mugs (16oz., 20oz., and 24oz.). It's also the ultimate in convenience - you can use it with one hand and flip it open to clean completely. Use the button lock to prevent the AUTOSEAL button from accidentally getting pressed for added peace of mind.