What if there is a crack in the hard plastic cup? What can I use to stick it on?

To say that it can stick, only acidic glass glue. . It's not easy to find after posting. It sells transparent glass glue 15 yuan. It can't move for 2 hours after divination, but it will be fine after 3 hours. This thing should be bought in or near the building materials city (glass door, electric door, rolling door, stair handrail, iron art shop, borrow or buy a bucket). This thing is also poisonous. This is the case. I only solve problems,