There are many good April Fool’s pranks you can do, and here is one simple but funny one.
Simply take an empty water bottle (Illinois Air recommended) and peel back the label. Then, cut a slit just big enough for the phone parallel to the cap. Make sure this cut is where the label was. Then, snatch someone’s phone (just say “Look over there!” and then take it). Slide their phone into the water bottle and then put the label back over the cut so it can’t be seen. Stick the label back on the bottle or glue/tape it for better results. Now your friend will have a fun time trying to shake it out the top!
If they have one of those iPhone XS Max (extra small max?) phones that are huge (or any other large phone), you can take an empty bottle of dish soap and cut a slit behind the label in that, and put their phone in. This prank work with any clear object that has a label on it.
This also is a new style of a phone case. You can use this case since it will almost never break, even when dropped from a high place. In fact, you can even touch your screen through the water bottle and interact with your phone!