That penny trick is a classic one, and the copper does help. I found it works even better if you also cut the stems at an angle and change the water every couple days. Keeping them out of direct sun and away from ripening fruit makes a huge difference too. My blooms easily last a week longer with that whole routine.

The mods here never explain their decisions. It's all about clear rules, not banning memes. Just post the guidelines lol.

Last July at my uncle's house, I saw the same thing happen! My brother quietly said the table was wobbly, but everyone ignored him. Sure enough, all the drinks tipped over. It taught me to never hold back a warning!

Glass pans have always given me soft brownies without burnt edges. My oven runs hot, so metal would overdo it. Maybe it's more about heat control than the type of pan.