Double Spindle inside of a green 5 inch float.

One spindle is seen as a fine free standing thread of glass running from top to bottom.

The second spindle is a wavey thin ribbon spindle that visibly really stands out.

There are tons of bubbles in the glass.  Some of the bubbles are very elongated.

There also appears to be a remnant of a barnacle on the seal.

Found on Hokkaido Island, Japan.