Identifying Small Glass Tubes Containing Three Tiny Ball Bearings

You know that moment? Sun beating down. Line limp in the water. You’ve stared at that bobber so long you’re questioning life choices—Did I insult a fish in a past life? Is my bait secretly boring? I was there once, slumped over my tackle box like a man mourning a lost cause, when an old-timer with saltwater in his veins and wisdom in his wrinkles glanced over.

“You try glass rattles?” he asked.