This uniquely designed flip cap makes on-the-go hydration easier, cleaner, and convenient. The cap replaces the Bubi plain cap, Bubi bottle and contains a nipple (not a straw) under the latched compartment. The latch pinches the nipple to avoid any spills or leaks. Therefore, enjoy your coffee or tea without the worries of spilling with our leak-resistant technology. This accessory also allows for two forms of flow- bite top to bottom for a slow liquid flow or bite side to side for faster flow.