Quick Answer:The Bursting Bottle, Without Plug 90x20mm is a 90 x 20mm cast-iron bottle used to demonstrate that water expands when it freezes. Its neck is tapped to take a threaded, square-shanked iron stopper.
Last updated: 18 October 2026
Key Features
Cast-iron bottle, 90 x 20mm.
Tapped to take a threaded, square-shanked iron stopper.
Designed to demonstrate the expansion of water on freezing.
Sold without a plug, as the name states.
Technical Specifications
Specification
Value
Material
Cast iron
Size
90 x 20mm
Thread
Tapped for a threaded, square-shanked iron stopper
Plug
Not included
How It Is Used
The bottle is filled completely with water, closed with a threaded iron stopper and chilled until the water freezes. As the water turns to ice it expands, and the force is enough to burst the cast-iron bottle, showing how strongly water expands on freezing.
Frequently Asked Questions
Is a plug supplied with the Bursting Bottle, Without Plug 90x20mm?
No plug is included, as the name indicates. The bottle is tapped to take a threaded, square-shanked iron stopper.