This is about the most theologically corrupt thing I've ever seen.
"Ashes are a reminder that we're all gonna die. You put glitter in there, and suddenly you're witnessing to hope that is gritty and real!"
We ARE all going to die. That's KIND OF THE POINT of Ash Wednesday.
Secondly, your hope is supposed to come from the Gospel, and specifically the passion, death, resurrection, and ascension of Jesus Christ. If your hope comes from glitter, it is no hope at all.