$59 will get you a Redrock Micro DSLR Mini Tripod Platform which is used for getting your camera on and off the tripod and back into your hands with ease.
The DSLR Mini Tripod Platform is a compact, inexpensive way to quickly and easily attach your DSLR rig to a tripod.
This accessory mounts to the bottom of your DSLR baseplate and adds a mini cheeseplate with a variety of 1/4″ and 3/8″ mounting holes. You can easily attach your tripod quick release plate to quickly switch between handheld and tripod-supported setups.
See Redrock Micro for more details.