The UE Wonderboom two as well as the UE Boom 3 are quite portable and durable. The Wonderboom is slightly much more portable than the other two, weighing in at 15 ounces and boasting IPX7 waterproofness. Its small and stout shape also aids it vanish inside of a backpack. https://www.bluetoothspeaker.top/original-wireless-rgb-speaker-outdoor-portable-with-ip67-waterproof-bluetooth-speakers/