I set these to not stack in the config, but they are stacking anyway. This is a problem for players because when they are filled and subsequently get stacked the water disappears.

Modify the plugin cs file lines 25-32 to be this instead; this adds items that the plugin fully ignores like the waterjug. 

private readonly List<string> _ignoreList = new List<string>
{
    "water",
    "water.salt",
    "waterjug",         // vanilla 1 — the jug (holds liquid)
    "botabag",          // vanilla 1
    "smallwaterbottle", // vanilla 1
    "bucket.water",     // vanilla 1
    "gun.water",        // water guns hold water
    "pistol.water",
    "cardtable",
    "hat.bunnyhat",
    "rustige_egg_e"
};