Definitely not enough. Mine I bought about 15 packs 5L and only have 25 table. About 22-23 table occupied. At the end only left 1-2 box.

You calculate total people attend and total liter how many 1 person get. Also don't forget in wedding there a lot of wastage. They will bottoms up like crazy and some not drink finish. So you agak agak la from your invitation list.