I use 10mL pipettes with some rubber bulbs that have a valve at the top (for expelling some air) and below (for controlling the amount of liquid sucked up). They are from a lab supplier. The valves are simply moulded into the bulb, and release very gradually with pressure from finger and thumb, so the movement of liquid up the tube is slow and steady if you want it to be.

Smaller ones are available, and would be adequate for me in terms of volume, but they're harder to rinse because of their narrowness.