What’s a thoughtful wedding gift for close guy friends in their 30s–40s?

Two of my guy friends who are like brothers to me are in new relationships and are in love. They're considering proposing next year. If they get married, what sorts of wedding gifts do you give people nowadays? Most of my closest friends are single and unlikely to get married, so I don't actually know what people in their thirties or forties would want. Money in a card?

What’s a thoughtful wedding gift for close guy friends in their 30s–40s?
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