NWT. This is an infusion water bottle. There is a compartment inside where you can add sliced fruits and veggies to give your water or other drinks a boost of natural flavors! This is healthy for you and so much better than plain water. You can do cucumber slices which is delicious! Or try sliced strawberries! The possibilities are nearly endless. This is perfect for taking to the gym or out for a walk or to work. You can use it any where! Give your water an infusion boost!