Put this heat-resistant glass disc in the bottom of your pot of water. You will know the water's boiling when you hear the ring gently rattling. Save on energy costs and time.

• Tempered Glass Boil Alert
• Place in Pot of Water, Will Gently Rattle
• Alerts You When Water Is Boiling
• Great Gift Idea
• Perfect Addition to Any Kitchen

Tempered Glass Boil AlertFox Run