Glitch with water! [YET UNSOLVED!]

I'm having a problem with water! To make a long story short, there's a block in my mod that spawns a dropped water bottle item. The only problem... THERE'S NO WATER BOTTLE IN THE ITEMS MENU! I was considering making an item that you can craft into a water bottle instead, but water bottles can't be in crafting recipes either! Why is it so difficult for just a simple water bottle? Please, if ANYONE knows about this glitch, can you help? water

Edit: still unsolved! please, reply!