NOoo... they will, it just takes A LONG TIME. Like... almost an hour I think it was. Eventually they will slide down together. Once it cools, it literally pops/falls outta the metal bowl. I was impatient & put it directly in cold water & pop! out it came.
I just took pix & my battery died. It'll be about a half an hour for it to charge... & I'll post. I don't think ya have to use seed beads as filler... I'm just an impatient craftster.
If you guys want taller bowls, once you take it from the mold (the pan), put it by itself on tin foil/cookie sheet & heat it for a few moments with no mold. It will get VERY pliable.
Then shove it in a taller, thinner-shaped baking container and bake again. Careful when transfering it...hot beads don't mesh well with your paws. Tongs, skewers, etc., can help in accomplishing this.