Or a martini shaker.
I was just searching Amazon for a baby swing-- this family has a couple of outdoor-loving babies who could swing you under the table and I finally managed to find a tree limb in the backyard that doesn't dead end straight into a concrete wall-- when I found this swing by Fisher Price.

Hey, perfect! A brand I trust not to fall out of the tree, right size, good price... heyyyyy, wait a second:

Oh hell yes. This could only be better if instead of that pet stair thing, Amazon recommended noise-reducing headphones.