Inflatable Aquabells Travel Dumbbells are weights that are portable and compact when deflated. For a good travel exercise workout, adjust the weight you need by simply adding the right amount of water. When your workout is over, Aquabells empty in seconds and pack flat in your suitcase. Guaranteed not to leak. Aquabells Dumbbells set comes with two 13" long cushioned handgrips and eight attachable water chambers.. At last a portable gym that fits into your briefcase and you can workout in the convenience of your hotel room, home, boat or office.