It’s a sign

Back in the days when a friend and I used to brew beer, we’d buy bottled beer to drink, and save the empties for our home brews. Heineken beer was one of those, but we learned that Heineken bottles were made with fairly thin glass. We found this out when our home brew caused them to explode! The fact that we kept the bottles in our wardrobes meant that our work attire often smelled of beer, which is not recommended for career advancement.