What is the greatly durable and cheap material of kitchen utensils?

There is no single material that is both greatly durable AND cheap for all kitchen utensils. It depends on what you're looking for in a utensil:

For durability, you might consider:

* Stainless steel: It's very strong, resistant to rust and corrosion, and can withstand high temperatures. However, it can be quite expensive for higher-quality pieces.

* Cast iron: Excellent heat retention and durability, but heavier and needs proper care to prevent rust.

* Silicone: Durable, heat-resistant, and often non-stick, but can be less durable than other options for certain applications (like heavy stirring).

For cheapness, you might consider:

* Plastic: Widely available, inexpensive, and comes in many colors and shapes. However, it can be less durable and may contain harmful chemicals, especially when exposed to heat.

* Melamine: Lightweight, inexpensive, and shatter-resistant, but can't be used on high heat or in the oven/microwave.

* Bamboo: Renewable resource, often inexpensive, and naturally antimicrobial, but can be less durable and require more care than other options.

Ultimately, the best material for your kitchen utensils will depend on your specific needs and budget. If you're looking for the perfect balance of durability and affordability, consider looking for stainless steel with a silicone coating or high-quality plastic utensils that are BPA-free and heat-resistant.