aquifer
"An aquifer is like a sponge filled with wet gravel and with areas in between filled with water"
"The aquifer is like a bucket full of wet gravel with all the pore spaces filled with water and a bedrock seal on the bottom."
"The aquifer is like a bank account -- when you have more going out than coming in, you have a deficit, and right now we have a deficit,"
""An aquifer is like a milkshake glass and each well is the equivalent of a straw in the glass. What most countries permit is a limitless number of straws in the glass ..."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.