I prepared a ZIPPO lighter for my boyfriend. How can I give it formally?

As a man, the greatest praise for him is to satisfy his sense of accomplishment and conquest, and to affirm and support him. So, I think you should package ZIPPO well, full of mystery. Of course, you can't just send a lighter. You should write a letter yourself. I don't think I need to say much about the content. After both families have had enough to eat, you should boldly take out your gift in front of everyone and give it to your boyfriend with affection, and say a word that will move him enough to sublimate your feelings again, and at the same time let the two families feel the feelings behind you.

I hope it helps you.