I'm looking at silicone molds and it's hilarious what shapes you could make soap if you wanted to
like you could make a gingerbread house out of soap https://www.amazon.com/gp/aw/d/B09LHBS4CG/
how about a jar with a lid https://www.amazon.com/gp/aw/d/B099D8RHQC/
(this gives me cursed ideas)
very impractical for soap but a good gift for a kobold in your life https://www.amazon.com/gp/aw/d/B08P5JHCG7/
know a devout christian? give them a soap with an open bible with Jesus and a quote https://www.amazon.com/RESINWORLD-Large-Silicone-Casting-Hanging/dp/B09CMBDVJ5
less a hand soap and more a soap slab, but still