The Different Types of Flasks: Stainless Steel vs. Plastic

Bar shelf showcasing numerous liquor bottles

Flasks are popular drinking vessels that are used to carry and store a variety of liquids, including water, juice, and alcohol. They come in different shapes, sizes, and materials, but two of the most common types are stainless steel and plastic. In this article, we’ll compare the advantages and disadvantages of each material to help you decide which type of flask is right for you.

Stainless Steel Flasks

stainless steel flask in front of a mountain during a foggy dayStainless steel is a popular material for flasks because it is durable, long-lasting, and easy to clean. Here are some of the advantages and disadvantages of stainless steel flasks:


  • Durable: Stainless steel flasks are built to last and can withstand the wear and tear of everyday use.
  • Long-lasting: With proper care and maintenance, a stainless steel flask can last for years.
  • Easy to clean: Stainless steel is non-porous, which makes it easy to clean and prevents bacteria buildup.
  • Retains temperature: Stainless steel is a good insulator, which means it can keep liquids hot or cold for longer periods of time.


  • Expensive: Stainless steel flasks can be more expensive than plastic flasks.
  • Heavy: Stainless steel is a heavy material, which can make the flask heavier and bulkier to carry around.
  • Limited designs: Stainless steel flasks often come in limited designs and colors, which may not appeal to everyone.

Plastic flasks

Plastic is a lightweight and affordable material for flasks that is often used as an alternative to stainless steel. Here are some of the advantages and disadvantages of plastic flasks:


  • Affordable: Plastic flasks are often less expensive than stainless steel flasks.
  • Lightweight: Plastic is a lightweight material, which makes the flask easier to carry around.
  • Variety of designs and colors: Plastic flasks come in a wide variety of designs and colors, making them a popular choice for people who want a flask that reflects their personality or style.three plastic flasks, different sizes, two contain blue liquid and one contains red liquid
  • Customizable: Plastic flasks can be customized with logos or graphics, which makes them a good option for promotional or marketing purposes.


  • Harder to clean: Plastic is a porous material, which can make it harder to clean and can lead to bacteria buildup.
  • Does not retain temperature: Plastic is not a good insulator, which means it cannot keep liquids hot or cold for long periods of time.

Here at Anytime Bar Supplies, we offer a variety of plastic flask options too choose from! Check them out here.

Stainless steel vs. plastic: which one is right for you?

When it comes to choosing between a stainless steel or plastic flask, there is no clear winner. Both materials have their own unique advantages and disadvantages, so it ultimately comes down to personal preference and intended use.

If you’re looking for a flask that is durable, long-lasting, and easy to clean, then a stainless steel flask might be the best choice for you. On the other hand, if you want a flask that is affordable, lightweight, and comes in a variety of designs, then a plastic flask might be a better option.

Cleaning and maintenance tips for flasks

Regardless of the material, it’s important to properly clean and maintain your flask to ensure it lasts as long as possible. Here are some tips:

  • Hand wash your flask with warm, soapy water and a soft-bristled brush. Avoid using abrasive materials that can scratch the surface of the flask.
  • Rinse the flask thoroughly with clean water to remove any soap residue.
  • Allow the flask to air dry completely before storing it.
  • Do not put your flask in the dishwasher, as the high heat and detergents can damage the material.
  • Do not use bleach or other harsh chemicals to clean your flask.
  • If you notice any cracks, dents, or damage to your flask, replace it immediately.


Stainless steel and plastic are two popular materials for flasks, each with their own advantages and disadvantages. When choosing between the two, it’s important to consider factors such as durability, cost, design, and intended use. Regardless of which material you choose, proper cleaning and maintenance will help ensure your flask lasts as long as possible.