Brittany Thompson and her friends are linked for life. The 26-year-old and 10 of her BFFs had thin gold metal chains welded shut around their wrists and ankles during Thompson’s bachelorette party in Reedsburg, Wis., last year. For Thompson, the shiny bracelets and anklets she’s still wearing months later represent the sisterhood she has with her friends. “Whenever I see them, we all look at our bracelets. It makes it more meaningful to have it done with your closest friends — it reminds me of friendship bracelets,” Thompson said. Besides, she added, “It’s not like a tattoo. If you get sick of if you can just cut it off.” So-called…