In Poland, a lavvu is a tipi-like tent. Traditionally they've been part of Polish military kit, and each lavvu can sleep two.
One inconvenient part of the design is that it requires a center pole for support. This obviously affects how you can use the interior.
To avoid this, a UK-based company called RoughTimba invented this 3D-printed Tri-Pi for Lavvu product:
You're meant to cut three sticks at 1.8m (about 6') in length, stick them into the Tri-Pi, and there's your structure. A standard lavvu or a 3m x 3m tarp can be used for the covering. The Tri-Pi also features three holes, for hanging lanterns for lighting or a kettle over a fire.
It weighs just 46g (1.6 ounces) as it's not printed solid, but has an unseen honeycomb structure inside.
The Tri-Pi runs $33.75.
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