For a while now Flambeau tanks have pretty much been the standard tank for meth/water containers, at least for Aquamist kits. However, they are fairly pricey and sometimes difficult to purchase. Flambeau customer service is not that great in my opinion and I spent nearly a month just trying to order my tank.
I worked with Richard to try and find a new place to buy tanks. Richard suggested US Plastics and I ordered a tank to try it out. Price was about half of Flambeau prices and it was super easy to buy the tank. I just ordered it off the website and got the tank in less than a week.
Below are some pictures of the two tanks. I am pretty sure they are manufactured by the same company as they are pretty much identical in every way. If you need a meth/water tank, I suggest US Plastics.
Don't forget a cap for the tank --- link to buy
US Plastics
