Flying to Thailand with Refrigerated Medication: How to Keep It Cool on the Way

Why is flying to Thailand with refrigerated medication so stressful?

Because the problem isn't only cooling, it's uncertainty. A flight to Thailand is a whole day on the road: getting to the airport, security, waiting, a long flight, sometimes a stopover, and then the trip to the hotel in the heat and humidity. Anyone who has flown with a cooler bag and ice packs knows the questions: Is the ice pack still cold? Has it already melted? Is the medication too cold? And there's no way to know.

We know this up close. We've been living on the move between countries, with lots of flights and medication that needs refrigeration in our bag. On every trip the same question came back: how do you keep it cool on a long flight to Thailand, on a mountain trek in South America, or on a long trip to Europe where you need to take more than one injection, when there's no fridge in the room and the ice pack melts within a few hours? That question is why we started offering The Secrets Box by Practi.

How do you keep medication cool on a long flight?

The simplest method is not to rely on an ice pack the whole way, but on a power source. The Secrets Box connects with the USB to USB-C cable that comes in the box. At the airport and on the plane, you plug it into a 10W power bank (20,000mAh or more recommended, 10,000mAh also works). The power bank is sold separately. As long as it's plugged in, it keeps a steady range of 2 to 8°C (36 to 46°F), with no time limit.

The big difference from a cooler bag is the display. Instead of guessing, you look at the temperature and see it. It's also worth knowing what the fridge doesn't do: there's no disconnect alert. So check now and then that the cable is connected and the power bank is charged, especially before you fall asleep on the flight.

A small tip: switch the fridge on at home, before you leave for the airport. The XL 2.0 reaches the range within 15 to 20 minutes, and the Standard within 20 to 30 minutes.

What do you do when you land and there's no fridge in the room?

At your destination, whether it's a hotel in Bangkok or a bungalow on one of the islands, plug the fridge into a wall outlet with the wall charger from the box. It keeps 2 to 8°C (36 to 46°F) for as long as it's plugged in, so you don't need to look for a hotel with a fridge in the room, or ask the front desk for space in the kitchen fridge.

On a day trip, a boat trip or a long car ride, you can switch back to the power bank, or plug the fridge into the car's 12V socket with a USB adapter. The car adapter is also sold separately.

And what if there's no power at all?

That's what the bio-gel ice pack in the box is for, as a backup and not as the main method. According to supplier data, the ice pack keeps the cooling range for 33 hours at 30°C (86°F), 30 hours at 35°C (95°F) and 28 hours at 40°C (104°F). That helps on a day with a power outage, on a long journey with no outlet, or when the power bank has run out.

A vacation in Thailand with insulin or Ozempic: how many pens fit?

The fit depends on the size of the pen, not on the type of medication. In the XL 2.0, the cooling container has an inner width of 6.2 cm (2.4 in) and an inner height of 18 cm (7.1 in), and it fits up to 7 Lantus-size pens and up to 5 Ozempic-size pens. With wider pens, the number depends on the pen type. In the Standard model the container is smaller, 5 cm (2.0 in) wide and 16.5 cm (6.5 in) high on the inside.

For a vacation of several weeks, where you need more than one injection, check the pen list on our website in advance to see whether your pen fits, and how many.

What should you check before the flight?

Every airline and every destination sets its own rules, and they change. So check your airline's policy on medication and on power banks in hand luggage in advance, as well as the official guidelines for your destination. It's also worth checking whether you should carry a prescription or a doctor's letter. For storage information about the medication itself, the source is the medication's patient leaflet, your pharmacist and your doctor.

Packing list: flying to Thailand with refrigerated medication

• The Secrets Box, switched on at home about 20 minutes before you leave
• USB to USB-C cable (in the box)
• Wall charger (in the box), for plugging in at the hotel
• A 10W power bank, 20,000mAh or more recommended (sold separately), fully charged
• Bio-gel ice pack (in the box), frozen in advance as a backup
• A USB adapter for the car's 12V socket, if you're planning car trips (sold separately)
• A plug adapter for the outlets at your destination, if needed
• Your pens and medication inside the fridge, in your hand luggage and not in your suitcase
• A check with your airline: medication and power banks in hand luggage
• A check of the official guidelines at your destination, and whether to carry a prescription or a doctor's letter

Not just for flights: on an ordinary day too

Over time, The Secrets Box started to come in handy on ordinary days too: picking up injections from the pharmacy on a hot day, when there's no time to go straight home and put them in the fridge. Plug it into a power bank or the car, and the temperature is on the display.

Want to fly to Thailand without guessing the temperature in your bag? See The Secrets Box (rated 4.9 out of 5, based on 7 reviews).

Frequently asked questions

Can I take a portable medication fridge on a flight?

The Secrets Box meets TSA guidelines for medications on flights. It's also worth checking your airline's policy in advance.

How does the fridge stay cold during a long flight to Thailand?

You plug it into a 10W power bank (20,000mAh or more recommended, the power bank is sold separately). As long as it's plugged in, it keeps 2 to 8°C (36 to 46°F), and the temperature appears on the display.

What happens at my destination, when there's no fridge in the room?

Plug the fridge into a wall outlet with the wall charger from the box, and it keeps 2 to 8°C (36 to 46°F) for as long as it's plugged in.

How long does the bio-gel ice pack last without power?

According to supplier data: 33 hours at 30°C (86°F), 30 hours at 35°C (95°F) and 28 hours at 40°C (104°F). The ice pack is included in the box.

How many insulin or Ozempic pens fit?

In the XL 2.0: up to 7 Lantus-size pens and up to 5 Ozempic-size pens. With wider pens the number depends on the pen type, and in the Standard model the container is smaller. Check the fit for your pen in the pen list on our website. This is a size match only, and the list doesn't include every pen on the market.

---

How this article was written. We gathered this information from public sources online and brought it together in one place. We are not a medical body, we have no medical or pharmacy qualification, and no medical professional has gone over this article.

Accurate as of September 29, 2026. Information may change. Airport screening procedures, airline guidelines, medication leaflets and product specifications change from time to time, and the information here may no longer be up to date. It is the reader's responsibility to verify every detail with the official source before acting on it.

This article is general information, not medical advice. For questions about your medication, talk to your pharmacist or doctor. It contains no recommendation on medication storage, dose, method of use or how long a medication stays usable. The only sources for those questions are your medication's patient leaflet, your pharmacist and your doctor. Responsibility for storing and using the medication lies solely with the user and their healthcare provider. The Secrets Box is a cooled carrying case for medication.