The Bubble-Lok design pops open easily with the push of your thumbs yet your pills are stored securely when it is closed.The 7-Day Bubble-Lok® Pill Organizer features a unique, patent-pending locking system that simplifies operation and prevents pills from spilling inside your suitcase, briefcase or purse. The lids will not open if the organizer is dropped, yet it is uncomplicated to use. Large Product Dimensions (h x w x d): 6.5" x 1.5" x 1.25" XL Product Dimensions (h x w x d): 7.63" x 2" x 1.38"