I found a tall, skinny, "briefcase" type stainless thermos at Target for $9.99 that I am trying. It holds roughly 2 cups of plastic. I heat it in the oven before pouring in the plastic. I still have to warm the plastic periodically in the microwave, but I'm brand new at this, so I may be able to turn the hot plate up higher. I just haven't wanted to risk bvurning the plastic. It lets me dip my 8" lake trout tubes.