Back in the day, the way to hide extra cash, personal substances, keys, jewelry, valuable items and other things was the use of a can safe. The can looked like a can of soda water and you could simply stash your stuff and place the object into plain sight. The idea is the same with this, Pepsi Bottle Safe Stash Bottle by Party Monstr.
The concept is the same. In fact, this bottle weighs what a normal bottle of soda water would weigh. In fact, the bottle actually comes from the Pepsi company.
To access the hidden location, simply open the inner tube. It is one inch. It is also 3.5 inches deep. However, this stash bottle is not airtight. Hence, please, do not fill bottle with water, soda or any other liquid. It is just not wise to do so.
It is smart, though. Use it smartly and you will be a happy consumer.