HPLC Vials

A beaker is a simple cylindrical container with a flat bottom, usually made of borosilicate glass (like Pyrex) or plastic, and it often has a lip (spout) for easy pouring.

Cylindrical shape Ensures stability and ease of mixing
Flat bottom Sits securely on lab surfaces or hotplates
Graduated markings Approximate volume measurements
Spout (lip) For easy pouring without spilling