Yes.
When the temperature drops, the cup returns to its original color, and the effect can be repeated many times.
1. Thermochromic MaterialsThermochromic materials refer to certain substances (compounds or mixtures) that undergo color changes when subjected to temperature variations.
2. Classification of Thermochromic Materials
From a thermodynamic perspective, they can be categorized into irreversible and reversible thermochromic materials. Based on their color-changing cup temperature range, they are further classified as low-temperature (below 100°C), medium-temperature (100–400°C), and high-temperature (above 400°C) types. Based on the number of color changes within a specific temperature range, they can be categorized as single-color-change (color transitions from A→B) or multi-color-change (color transitions from A→B→C). Considering the composition and properties of reversible thermochromic materials, they can be further divided into three major categories: inorganic, organic, and liquid crystal.
