https://youtu.be/UxUJOuxNe44

On the outside this looks like a normal water bottle but looks can be deceiving. It has a secret compartment inside. 
Great for hiding valuable objects when you are on the road. What thieve would steal a water bottle? Unless he's really thirsty. :p

The secret compartment candle is also a great option. But in my opinion less stealthy.

For sale here on amazon:
Secret compartment water bottle: https://amzn.to/2NLibKd
Secret compartment candle: https://amzn.to/2MQxuSi

Other cool similar stuff:
Wall clock with hidden compartment: https://amzn.to/2ZIgQu9
Hair brush with secret compartment: https://amzn.to/2MPJdAE
3M scotch lint roller with diversion safe: https://amzn.to/2HEYb8y
Belt for your pants with a hidden money pocket: https://amzn.to/2MPbffu
Fake rock to hide your house keys: https://amzn.to/2ZEjEbS
Coca cola can diversion safe: https://amzn.to/2HE2SiQ