This sports cap makes on-the-go sipping easier and cleaner. The flip cap attaches to your bubi bottle and contains a nipple under the flip compartment. The hatch pinches the nipple to avoid any spills or leaks. Enjoy your coffee or tea without the worries of spilling with the leak-resistant technology. This Water Bottle Cap Accessory also allows for 2 forms of flow- bite top to bottom for a slow liquid flow or bite side to side for a faster flow.