What are you Stashing
Keep in mind that a secret stash spot will keep an item hidden from the common eye, but it will not necessarily keep a smell hidden from the common nose. If you are hiding something very valuable although stash spots work great, in some cases you may just want a safe.
Complex or Simple
The average secret stash resembles some sort of common, household item like a soda can or other container. Those options are easy to use and more often than not, will work. However, other more complex options exist such as the hidden wall safe which requires some installation into a wall, however it is a step up from the average stash spot.