These are somewhat abnormal homemade household things shaped like a triangle, made primarily by the Reang tribe which is one of the significant tribes of Tripura located in northeast India. They called themselves Bru or Bhru. The Reangs are primarily ecologically oriented, as they are closely engaged with all the domestic and agricultural related works using the specialty of nature in making items. Finely woven bamboo strips are made into the distinct triangular shape of the strainer. The triangular form increases the visual abstraction while the abstraction operates in transferring liquid. In construction, a twine twist of bamboo is applied along the two top open sides of the triangle so that this acts as simple handle. In this way, the handle imparts a counterpoise and, at the same time, easy manipulation for tipping and pouring and filtering the liquids.

When it comes to the uses among the Reang people, this strainer is primarily used for preparation of soda ash. Soda ash is prepared by allowing water to flow through ashes of burnt plant materials, commonly wood or dry leaves. While this allows the passage of excess ashy residues, it traps the alkaline solution that is used for washing their clothes and sometimes cleaning cooking utensils. All of this is in a very eco-friendly fashion and very rightly indicates the vast knowledge of natural chemistry and the resourcefulness of the Reang tribe. Thus, the Triangular Bamboo Strainer shows the way of living sustainability that is practiced by the Reang tribe and acutely demonstrates their knowledge in tool-making from rudimentary natural materials.