Convenient lid offers users a completely sealed beverage until they're ready to drink. When ready to drink; just pull the tab open and lock it back out of the way. Unique lid provides the ability to securely reclose the lid until ready to resume drinking; again and again. The Drink Well Plug? creates a strong; leak-resistant seal; for security on-the-go. Drink Well Plug? also serves as a protective shield to prevent contamination of beverages.