Ingredient of snowball cocktail that might float in can?

• Device controlling inflow into a cistern
• Cistern floater
• Floating ball that controls level in a water tank
• Commode component

Wikipedia Word definitions in Wikipedia
A ballcock (also balltap or float valve ) is a mechanism or machine for filling water tanks, such as those found in flush toilets , while avoiding overflow and (in the event of low water pressure) backflow. The modern ballcock was invented by José Antonio ...

WordNet Word definitions in WordNet
n. floating ball that controls level in a water tank [syn: ball cock ]

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Automatic top-up with a ballcock will allow all water in a new pool to pass first through the Eradicator. ▪ It had Hayley Syndrome-a missing ballcock . ▪ Meanwhile, I had to go up into the roof and push down the ballcock when ...

Wiktionary Word definitions in Wiktionary
alt. A floating sphere, attached to a lever, that controls the level of liquid in a cistern n. A floating sphere, attached to a lever, that controls the level of liquid in a cistern