To make the "double bubble" balloon, slip a straw into a 11" pink balloon. This will enable you to easily insert the pink balloon inside a 16" clear flower-print balloon. When the balloon necks are even, remove the straw.

Use Conwin's Duplicator 2 to inflate the "double bubble" balloons. The Duplicator 2's automatic sizing feature will quickly inflate the balloons to a consistent size. Set the Duplicator 2 to 10. Move the neck of the 11" balloon aside and inflate the 16" balloon first. Press the Duplicator 2 button twice to deliver two cycles of helium to the 16" balloon.

Readjust your hold on the balloon and place the 11" balloon over the filling outlet. Press the Duplicator 2 button once to fill the 11" balloon.

To tie the "double bubble" balloons, pull the neck of the inside 11" balloon out 2 to 3 inches Wrap the neck of the 11" balloon around the line or ribbon and the neck of the outside 16" clear balloon as you tie the knot.