Titan Sidekick fuel transfer tank

I'm curious if any has seen or used this or something similar in a tacoma? Dimensions aren't listed on their website but I did email customer service and hoping for an answer.
http://titanfueltanks.com/products/sidekick-tank/titan-sidekick-15-gal-portable-liquid-tank-5040015

 

I like it, but have not seen anything like that being used yet. Would be good for on board water system also.

 

I got some info back from titan:

19 ½ high, 9 wide and 45 long. To use it under a Tonnau cover you would need to change the supplied pressure cap with a vented cap from a dirt bike, then run the hose outside of the bed to allow it to vent to outside air.

It's literally 1/2" to tall
It'd probably be fine without a cover

 

What about a leer tonneau cover, instead of the backflip or the newerish trifold ones.??

 

My truck is a 16 and has the new trifold. It's 19" to the top of the bottom of the cover. I know this because I had to return a Roto cooler that was about 19.5 and wouldn't fit. I may consider a 15 gallon marine transfer tank in the future though