Pippettes, a tool for dispersing specific volumes of liquid, are quite possibly the most used tool in any bio lab. Most biologists buy their pipettes from a manufacture and they’ll usually set you back $500-$1000 for a set*. Or you can do what Kwalus did and make your own using a 3D printer, a balloon, a bit of duct tape and a spring.
Check out this video of it in action:
*Note: If you’re in need of quality(read:calibrated) micropipettes, I highly recommend genefoo, they’re DIYbio friendly and affordable.