Vinyl HELP

For my wedding I want to make flutes like this. I had done some research and it just said to let the vinyl dry for 48 hours or to blow dry the vinyl and that the vinyl shouldn't move. I did exactly that, but now I put it in the dishwasher and the vinyl came off. Any ideas ?

https://preview.redd.it/2lxbht58yo9h1.png?width=290&format=png&auto=webp&s=f912d8a5f9dd005a698e2e0a07b1d7ad6424a786