2. Fill it with cement. Cement is strong, and sand leaks easily. Cement is the cement slurry used to change the house. It will harden after drying, so the back of the third step need not be sealed. Nature is very firm. )

3. Insert steel bar along the bottle mouth, insert it into cement, and seal the bottle mouth with adhesive tape.

4. wrap a tape or something to make your hands softer and more comfortable.