This thermos cup is inspired by the color change mechanism of chameleon-chameleon skin contains a variety of pigment cells, which can change color under the influence of environmental factors such as light and temperature. We skillfully use this feature to make the cup present a different fresh appearance every day with the daily temperature change, effectively alleviating the children's psychology of "liking the new and hating the old"; At the same time, we innovatively integrate the classic water circle game design to inject full interest into the thermos cup and create children's exclusive thermal insulation products with both visual freshness and interactive fun.