Depending on your printer and print settings, this vase will probably leak a tiny bit. Mine hade= one small leak that barely dripped. You can leave it, put a filler in the leak, or buy some resin like I did and seal it completely. You don't want a thick resin like epoxy, you want something that will flow. I made this out of PETG but you can make it out of whatever you want. And again, if your layer gaps a super tight and your settings and all tight and correct then this might not leak. I also HIGHLY RECOMMEND printing this slow at about 60 to 90 mmps if you want little to no gaps or leaks. I made the first 30 mins of this at 40 mmps and after that I did 60 mmps, then for the second half I made it at 85 mmps.