November 1, 2021


It is a container with a screw cap which contains a tube and an opening that connect with the liquid contained in it. Small amounts of this liquid can be obtained through the opening. It is usually made of plastic and is used to wash glass containers with distilled water.

What is it?

Also known as a washing flask or wash bottle, it is a cylindrical container made of plastic or glass that contains a small tube that protrudes to the outside like a nozzle. Inside it contains some solvent, usually distilled water, ethanol, hexane, methanol, which are necessary in the laboratory.

The tank is used to clean test tubes, electrodes and beakers. They are also useful for cleaning ground glass from glass joints or joints.


Among the characteristics of a t-shirt we can mention:

  • It is a closed container with a cap crossed by one or two tubes. One blows and the other comes water or solvent.
  • It has a nozzle that allows you to adjust the direction of the jet of solvent to be dispensed.
  • It can have different sizes, ranging from 30 ml to 1 L capacity.
  • May contain solvents or reagents commonly used in a laboratory.
  • It is unbreakable and resistant.

What is it for?

The main use of a tank is to clean and rinse different quality plastic or glass materials. It can also be used to clean electrodes and to dispense small amounts of liquid to reach the final capacity before preparing different solutions.

The container dispenses the liquid when there is an increase in pressure, in this way, the liquid rises through the tube to the dispensing nozzle. The pressure can be manual or through the introduction of air through a second tube.

The piso is used in laboratories of biodiagnosis, research, chemistry, biology, pharmacology and microbiology.

It is used to rinse containers and glass or plastic materials such as flasks, test tubes, beakers, among others with deionized or distilled water and disinfectant solutions.

It is also used to rinse reaction plates, pH meter electrodes and automatic pipettes with demineralized water.

When it comes to gauging the exact amounts of a substance, it is essential, since it allows minuscule amounts of liquid to be dispensed into a container until the indicated capacity or measure is reached.


T-shirts can be classified according to:

According to the material

They can be polyethylene plastic shirts and glass shirts. There are also some made of Nalgene FEP Teflon, a special type of plastic.

Depending on the type of material, they will have different properties and uses, although inert or non-reactive ones are preferred, as they do not contaminate the liquid they contain.

Nalgene Teflon FEP shirts are used to contain reactive solvents that can damage common plastics . In addition, they can be sterilized in autoclaves. That is why these special pipettes can be found in microbiology laboratories or in places where high aseptic conditions are required.

Some shirts are designed to withstand heat or cold, some can be transparent and others completely opaque to protect the liquid from light.

According to the type of solvent you store

Depending on the solvents they store, the shirts are classified by the color of their cap or bottle, this quickly guides the user and increases safety in the laboratory.

Generally, those with a blue or white cap are used only to contain distilled water.

Those with a yellow cap contain isopropanol, those with a white cap ethanol or sodium hypochlorite, those with a green cap contain methanol, and those with a red cap contain acetone.

There are also t-shirts that contain liquids in two phases, they are t-shirts with a spiral interior that allows gas to be eliminated. In these cases they usually contain solutions of water and bromide.

Precautions and Recommendations

  • T-shirts containing solvents, such as ethanol or methanol, that release vapor should have a small hole in the lid to facilitate the release of the vapors.
  • They must be located within reach of the user.
  • Despite the color coding on the caps, they must have a label that specifies the solvent they contain, especially if it is dangerous.
  • They should be cleaned regularly to avoid possible contamination.


Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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