Actually, eppendorf is a brand. They make a lot of plastic stuff - tubes of different volumes, cell culture dishes, pipette tips and what not. But here in this post the usage is like of xerox for photocopy machine. Here they are these small plastic vials with caps usually in volume range 200 microlitres to 2 ml. Beyond this volume tubes with pointed ends that can take 15 - 50 ml are called falcons (which is another company name which makes a lot of stuff 😁).