Official websites use .gov
A
.gov website belongs to an official government
organization in the United States.
Secure .gov websites use HTTPS
A
lock (
) or https:// means you’ve safely connected to
the .gov website. Share sensitive information only on official,
secure websites.
A closer look at the latch system that holds the Niskin lids together. The top Niskin bottle lid is also connected to the bottom lid via rubber tubing, creating tension inside the bottle that will ensure both lids close simultaneously.
