Make a Salsa jar into a fun money box.

The easy way to cut the hole is to put the funnel on the lid, then draw a circle. Then you know where you are cutting to. I drilled a hole with a step drill, then cut flaps around the hole with tin snips and bent them back so the edge was not sharp.  

If you prefer you can cut the hole bigger than needed and glue on the funnel, that would also cover any sharp edge.  
 

Follow the instructions on the original to attach the coin slide and clip.  

https://cad.onshape.com/documents/25ab573af407fb7e8c6d9b92/w/28b494f573b649315104c33a/e/129e97493a86a4bee66947d9