Double Bubble Balloons are made of latex-free stretchy plastic and a second balloon manufactured inside the first one. These Bubble Balloons have two self-sealing valves, and can not be stuffed with other balloons. Double Bubble Balloons are only available in 22-inch.
These balloons are available in a variety of printed and clear combinations on the outer and/or inner balloon.
Please see the How to inflate Double Bubble Balloons.