Parametrized sink sponge holder. It works great for smaller sinks where putting a holder inside the sink doesn't really work. It's supposed to lock onto the sink edge. Uploaded model is rather large (sponge area is 140x110mm at 10deg angle) as I'm using big sponges.

If you would like a different size, let me know in the comments and I will share a customized design or edit it yourself by forking this OnShape document. Everything you may need is parametrized for easy edits. If editing yourself expect some fillets or chamfers to break if dimensions will change by a lot.