Features: 【Stain removal】Efficient effervescent tablets, quickly dissolve stubborn dirt. Suitable for daily use, solves the problems of tea, coffee stains and other accumulated over a long period of time, and makes the water cup look brand new. [Safe Components] Use materials, which are harmless to the human body. Suitable for home and office use, especially for people who are concerned about health. 【Convenient operation】No need to scrub, just put it in clean water to clean automatically. Suitable for busy office workers and students, keeping the water cup sanitary easily without additional tools or time. 【Widely Compatible】Applicable to water cups of various materials, including glass, stainless steel and ceramic. Solve the problems of cleaning different materials and are suitable for the diverse drinking needs of family members. [Long-term fresh】Ingredients effectively extend the service life of the water cup and prevent odor from occurring. Suitable for users who have high requirements for cleaning water cups, that every use is as fresh as a new cup. Specifications: Process: High-efficiency effervescent technology Size: Single piece diameter 2 cm Attributes: 1 box 12 pieces Practicality: Suitable for cleaning water cups of various materials, quickly dissolve and remove stubborn stains and odors, keeping the water cup fresh and free of residues. Package Includes: Water cup cleaning effervescent tablets × 12 tablets note: Please allow 0-1cm error due to manual measurement. make sure do not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.