A replaceable container topper is disclosed. It is mainly combined with the cover of any container (clamshell cover or separate cover). The cover is configured with a first joint structure, and the topper is configured with a matching second joint structure at a corresponding position, so that the topper and the cover can be combined firmly and stably, and can also be separated easily and quickly; the topper can have various structural and functional designs with no limit to its shape and structure, including working as: any of a fixed or movable handle, a soft long suspender or short band, a decorator of any style, a small electronic device or mechanical device. Through various designs of the topper, the container as a whole can have unique and personalized styles to not only enhance the aesthetics but also provide additional practical functions, such as telling the time, playing music, emitting light, positioning and tracking, or even to provide value for collection.