Heat Stick 101

[Brewbirds]

Could those of you in the know give me a run down on heat sticks please?

I use this sink for washing bottles among other things and an alkaline brewery wash that recommends a temp of 140F.

Stainless Sink.JPG (36.11 KiB) Viewed 679 times

I'd like to be able to reheat/maintain heat so I can conserve water (and cleanser) by letting the bottles pile up until I have a couple of soaks worth per wash day.

BB2 saw a heat stick on Amazon but it was only a thousand watts with a max temp of 150F.

Basically I'm interested in how to shop for a good quality one and if it would serve my purpose.