Anyone use casting bubbles?

A different kind of fly fishing, Opinion

3-Pack Casting Bubbles

Tek-Tip: Reduce Bubbles in Clear Casting Resin - Polytek

Tiny bubbles: Researchers develop a flexible new system for

3-Pack – Magic Casting Bubbles

Manufacturer: Kwik Tec Material: Plastic Style: Casting Bubble Shape: Pear Size: 2” (overall 2-5/8L x 7/8W) Color: Red A versatile 3 in 1 float; use

KWIK KAST - RED - Casting Bubble fly fishing float - USA made

Rough Surface vs Cast Bubbles, Page 3

The Bubble' Cast vs. Kelly Clarkson & Leslie Mann- Disaster Movie

The Rookie: Feds' Season 2 Renewal Update: ABC Extends Cast Deals

Anyone know what this bubble means and why can't I cast my line to