Anti siphon caps for Rotopax?

Wondering what you like for anti siphon caps for your Rotopax. Thanks! I have the locks so they will no be able to be removed from the Molle Boards, but also want to make sure the gas isn't nabbed!!
Thanks!

 

Haven't had to worry about that yet. I do have some locks that I only used once when I was in Fresno. Only other time I had a concern was when I had to leave my truck for a few days and forgot to take the Rotopax off. Then I just put it in the bed under the tonneau cover.

 

I can tell you people use drills for any fuel, its rare we see siphon damage anymore.

 

Let the thieves get that and not drill your Tacoma fuel tank.

 

Last year we had several work trucks ripped off on several different occasions. Each time they just drilled a hole in the gas tank, they don't even bother siphoning.