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How long can the Thermos Travel Mug 300ml keep drinks cold?

Jun 27, 2025

Hey there! As a supplier of the 300ml Thermos Travel Mug, I often get asked one question: "How long can this little guy keep drinks cold?" Well, let's dive right into it and find out!

First off, let's talk about the technology behind these mugs. The 300ml Thermos Travel Mug uses double - wall vacuum insulation. This is like having a little protective bubble around your drink. The vacuum layer between the two walls acts as a barrier to heat transfer. Heat can't easily move through a vacuum, so it helps to keep the cold in and the heat out.

Now, the actual time the mug can keep drinks cold depends on a few factors. One of the biggest factors is the starting temperature of the drink. If you fill it with ice - cold water straight from the freezer, it's going to stay cold longer than if you fill it with lukewarm water that's been sitting out for a while.

1Thermo Flask Bottle With Unique Cup Lid

Another factor is the environment. If you're using the mug in a hot and sunny place, like on a beach in the middle of summer, the heat from the surroundings is going to try and seep into the mug. On the other hand, if you're in an air - conditioned room, the mug won't have to work as hard to keep the drink cold.

Based on our tests, under normal conditions (room temperature around 20 - 25°C), the 300ml Thermos Travel Mug can keep drinks cold for about 12 - 18 hours. That's a pretty long time! You can fill it up in the morning, head out for the day, and still have a cold drink in the evening.

But if you're in a really hot environment, say 35 - 40°C, the time might be reduced to around 6 - 10 hours. Still not bad, considering how much heat is trying to get in.

Let me give you a real - life example. A customer of mine went on a long hiking trip. He filled his 300ml Thermos Travel Mug with ice - cold lemonade before he started. The temperature outside was around 30°C. After about 8 hours of hiking, when he took a sip, the lemonade was still nice and cold. He was really impressed!

Now, if you're looking for something a bit bigger or with different features, we also have other great products. Check out our 20oz Stainless Steel Reusable Vacuum Flask. It's perfect for those who need a larger capacity. And if you're into unique designs, the Thermo Flask Bottle With Unique Cup Lid is a great choice. It not only keeps your drinks cold but also looks really cool. We also have the Thermos Double Wall Travel Mug, which has all the benefits of double - wall insulation.

Our mugs are made from high - quality stainless steel. This not only makes them durable but also resistant to rust and corrosion. They're also easy to clean. Just wash them with warm soapy water, and they'll be good as new.

The lids of our mugs are designed to be leak - proof. So you don't have to worry about spills in your bag or on your desk. Whether you're commuting to work, going to the gym, or just running errands, these mugs are a reliable companion.

We understand that different customers have different needs. That's why we offer a variety of colors and styles for the 300ml Thermos Travel Mug. You can choose the one that suits your personality.

If you're a business looking to order in bulk, or an individual who wants to get a great deal on multiple mugs, we're here to help. We offer competitive prices and excellent customer service.

Whether you're a coffee lover who wants your morning brew to stay cold throughout the day, or a water drinker who needs a reliable way to keep your water chilled, our 300ml Thermos Travel Mug is a great option.

So, if you're interested in learning more about our products or want to place an order, feel free to reach out. We're always happy to have a chat and help you find the perfect thermos for your needs.

References:

  • Internal product testing data of the 300ml Thermos Travel Mug
  • Customer feedback and real - life usage reports
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