diff --git a/cow.lua b/cow.lua
index b8ff87f..dbee0d5 100644
--- a/cow.lua
+++ b/cow.lua
@@ -157,7 +157,7 @@ minetest.register_craftitem(":mobs:bucket_milk", {
 	inventory_image = "mobs_bucket_milk.png",
 	stack_max = 1,
 	on_use = minetest.item_eat(8, "bucket:bucket_empty"),
-	groups = {food_milk = 1, flammable = 3},
+	groups = {food_milk = 1, flammable = 3, drink = 1},
 })
 
 -- glass of milk
@@ -165,7 +165,7 @@ minetest.register_craftitem(":mobs:glass_milk", {
 	description = S("Glass of Milk"),
 	inventory_image = "mobs_glass_milk.png",
 	on_use = minetest.item_eat(2, "vessels:drinking_glass"),
-	groups = {food_milk_glass = 1, flammable = 3, vessel = 1},
+	groups = {food_milk_glass = 1, flammable = 3, vessel = 1, drink = 1},
 })
 
 minetest.register_craft({