The Hard Hat cache containers are back-to-back clear plastic jars.
The overall size is about 3" dia x 7" long. One half serves as a
display case for a mini-batting helmet for one of the 30 major
league teams, the other half is a small cache container. Please
don't try to unscrew the display side jar.

The Florida Marlins are a professional baseball team based in Miami
Gardens, Florida, United States. Established in 1993 as an
expansion franchise, the Marlins are a member of the Eastern
Division of Major League Baseball's National League. The Marlins
play their home games at Dolphin Stadium, also home to the Miami
Dolphins.
The Marlins are notable for winning the World Series twice
(1997, 2003) during the only two times they've made it to the
postseason. They won despite never winning first place in their
division, advancing to the playoffs both times as the National
League Wild Card winner. They are the only team to have won all of
their postseason series to date.
In recent years, the Marlins ownership has pushed for a new
stadium and recently agreed to a plan with Miami-Dade commissioners
and the city of Miami to build a $515 million ballpark on the site
of the legendary Miami Orange Bowl. As part of the deal, the
Marlins in the future will be known as the "Miami Marlins." Their
final season in Miami Gardens will be the 2011 season.
The Marlins name originates from the fish species. Also, for
many years Miami's minor league team was the "Miami Marlins." The
team is casually nicknamed "The Fish."