Well, when you use the Donor kit for /ma j, it gives you a water bottle. I don't think this is what was intended...
What version of minecraft are you playing with? This server is really 1.8. It uses programs to allow you to play while using 1.9+, but it is not 100% compatible with the new versions. There for some of the items do not display properly. Potions appear as water botttles in 1.9. Just switch your game version to 1.8 before joining the server for the best game play experience. Change your game version by starting minecraft, hitting the edit profile button in the bottom left corner (before you hit the play button), go look at the Version Selection, and pick an older version of minecraft from the drop down menu. Save and then hit the play button. Join server as usual. This is a link is to Mod Fungamer333's gif of what the versions drop down menu looks like. Cannot view/buy items at Warp Grass or Warp Donor
