These beautiful travel-friendly refillable spray bottles are perfect for carrying your perfumes, body sprays or other sprayables. There are six (6) to a package, and at just under 4 inches long, they fit well into a purse. With a 10ml (about 1/3 fluid oz) capacity, it meets Transportation Security Administration (TSA) standards for liquid volumes if taken on flights when placed into a zip-top bag (not included). The bottle(s) can be refilled by pulling off the aluminum top, then, pulling the shinier inner silver spray mechanism under the pump top away from the aluminum base and unscrewing the bottle from the spray mechanism. The neck of the bottles where they can be filled is just under 1/2" wide. Enjoy your new travel sprayers!