Combo of 2 & 3 sturdy lightweight and durable flasks. This versatile flask combo will be your favorite for the years to come. It is flat and form-fitting so that it is not too bulky when your vest or jacket is closed, yet has enough volume to be useful. It is made of plastic and BPA-free. So, even if it falls, it won’t break like harder metal or plastic flasks. It seals nicely and is perfect for any liquid to avoid spillage.