Literature Reference: The inkstone warms to melt frozen ink, the bottle becomes a spring of warmth. Source from 'Qingzhanzhang Ershi Yun'.
瓶: Bottles, wine vessels, and flower vases.
煖: Synonymous with "Xuan." Warmth, as in: "Warm as spring." — Zhuangzi, "The Great and Venerable Teacher."
Meaning: The warmth in the bottle symbolizes the vitality and warmth of spring.