A purpose-built stainless steel hangi cooker. The cooker is a rectangular design, with four solid legs welded to the base. The drum of the base has a built in stainless steel ledge, which reduces the number of rocks used compared to standard commercial designs. There are eight Taranaki andesite river stones sitting on the ledge within the base of the cooker. The base is then fitted with three stainless steel baskets, which are used for holding the kai while it is being cooked. These sit above the river stones. The lid is another large stainless steel rectangle, with a raised edge along the bottom and two handles midway up the side of the cooker. Embossed on another piece of stainless steel and welded to the side of the cooker is a stylised logo stating ' TE KOHATU '. On the top of the lid is a heat indicator. The cooker comes with an attachment with a flexible hose which connects to a standard gas bottle. At the end of the flexible hose is a fixed metal stem with a black rubberised handle and a handle, which connects to a stainless steel head with perforated sides. This head connects to the base of the hangi cooker and heats the stones, when the attachment is connected to a gas bottle.
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He started to produce a rectangular hangi cooker made from stainless steel, using real river stones which were sourced locally. These stones imparted a beautiful flavour to the food being cooked, and as they were used more and more they took less time to heat up. Each cooker came with a blower attachment which could be attached to any standard gas bottle, and got the stones glowing white hot within an hour. The kai then cooked for two to three hours. As John said, "The success of the product is in the kohatu, in the stones".
Tipene initially sold the keg-shaped prototype models on Trade Me, with the first 40 selling out within days. He then moved to the box shaped models, and his business went from strength to strength. He began running the business full time and hired staff to help weld and construct the cookers, all out of his garage in Waitara.
Sadly, these portable hangi cookers are no longer being manufactured.