This is a great trick. I used it as a gospel magic trick for the Holy Spirit/Pentecost. It is extremely simple and easy to use. If I can do it successfully, anyone can.

Here are the things I had to fix/modify to make the trick work more smoothly:
The wick on the top was not glued properly, so I had to reattach it.
The magnets were not strong enough to get a good grip on the top. I added stronger magnets.
The gimmick part of the can leaks. The welds are not solid and not complete (think spot weld). So when you fill it with water or tip it, water leaks into the secret compartment. This is easily fixed with some silicone, which is what I did, so no more leaks!

I would recommend this trick, but know that you will have to work on it.

I've tried two cans and both have leaked. I had to take the can to a professional to fix it. Thankfully, after the 2nd leaky can, I was offered a company credit. I would have liked a partial refund, but a credit was fine. Just be careful because both cans I received have leaked.