Sentence examples for a sponge from inspiring English sources

The phrase "a sponge" is correct and usable in written English.
It can be used to refer to a porous material used for absorbing liquids or metaphorically to describe someone who absorbs information or experiences.
Example: "She is like a sponge, soaking up every bit of knowledge during the lecture."
Alternatives: "an absorbent material" or "a knowledge absorber".