How do I replace an item to a player inventory

[fringe reef]

If they drinked the milk it would replace another milk and it has a custom name and a custom lore... Is their anyway to do it?

[pulsar fulcrum]

please make sure to read the docs before posting questions @fringe reef
https://docs.skriptlang.org/effects.html#EffReplace

that will answer the question for you