2. If you don't knock on the cup at home, you can use it as a tableware for your pet, which not only solves the trouble of breaking the cup, but also makes your pet happy.
3. cups that are not needed at home can also be used to cushion flowerpots. Because there is often water residue polluting the balcony when watering the flowers, you can put the cups that are not used at home under the flowerpot, which is both beautiful and practical.