Is it appropriate to give a weather forecast bottle to a male friend as a birthday present?

Nice gift. If you do it yourself, your friends should be moved!

Weather forecast bottle originated from navigation in19th century. Boys like this kind of thing with scientific sense and knowledge. Watching this is much more intuitive than listening to the weather forecast. The point is, it's still beautiful.

You can go online and see how to do it. Very detailed! It's really too difficult. Let your male friends do it with you, one for each person.