My wife makes great 3D cake creations. You can see her stuff at http://frazicake.wordpress.com To make the cakes stand up, she needs to use dowels (sticks). But, it's trouble getting those sticks to stand up.
So, I designed & printed some simple adapters to allow the dowels to fit into a shaft just the right size, which can then be screwed into a platform.
The first iteration worked just fine! The fit was snug.
So, now, just copy the design into an array & print a set of 15 in one shot!