This is a simple sponge holder for kitchen which sits over the divider in the sink. This is designed for divider thats about 45mm in width but if you need to customize it for a different size you can easily do it by cloning the model in onshape linked here. 

The height of it is on purpose a little low to save material but again you can very easily customize to your needs. In the onshape model I have made these a variables and you just need to enter the dimension you need.

Print the model on the side and you should not need any support or brim

hope you find this useful!