A Tea + Coffee Travel Kit That Fits in a ~1 L Bag

One of my latest hobbies has been one-bag travel, and one of my main challenges was keeping a full coffee kit with me, including the grinder, without letting it take over my bag.

This is the smallest version I have settled on so far: an AeroPress, a hand grinder, a tiny immersion heater, beans, tea, filters, and a few accessories, all packed into a pouch that is roughly one liter.

What Fits

• AeroPress Go Portable Coffee Maker Kit , including the brewer, cup, and cap
• 1Zpresso Q Manual Coffee Grinder , split between the grinder body, catch cup, and handle
  • This was the best compact travel hand grinder I could find, and I have been very happy with it. I also use a larger 1Zpresso grinder at home.
• AeroPress paper filters , inside a zip bag that I keep in the AeroPress cap
• Immersion Water Heater , packed with the tea kit and grinder handle
  • I use one of those ultracompact immersion heaters that are common in southern Brazil, where a lot of people drink mate. The linked one is the closest international equivalent I found, not the exact same model.
• Coffee beans in a small zip bag, with the grinder catch cup stored inside the bag to serve as a spoon
• Tea in a small tin
• Tea infuser
• An older blue-and-white striped Daiso insulated lunch pouch

Tea Is Easy

Tea does not need much: leaves and an infuser are enough. I keep green tea and a small tea infuser inside a small matcha can, plus black tea inside a zip bag.

I pack the tea can, heater, and grinder handle together, then use the 1Zpresso sleeve to store that bundle.

Coffee Is the Hard Part

The coffee kit was the real challenge. For a complete brewing setup, I had to fit the grinder, water heater, filters, coffee beans, and a brewing method. I considered the AeroPress the most compact option that still felt like a complete coffee setup.

The grinder is the useful part of the puzzle. Its catch cup stays with the beans and doubles as my scoop, while the grinder body nests almost perfectly inside the AeroPress.

So the grinder is not just another cylinder to pack. Most of it goes into space that would otherwise be awkward or unused.

Packing Sequence

The packing order is:

1. Keep the grinder catch cup with the beans.
2. Put the grinder body inside the AeroPress.
3. Bundle the heater, tea, infuser, and grinder handle.
4. Let the soft parts fill the gaps.

I am calling the pouch “~1 L” rather than claiming an exact rated capacity. It is an older tapered Daiso insulated lunch bag. My measurements are about 14 x 8 cm at the base and about 14 cm tall, but it narrows toward the zipper and rounds out when packed.

Water Heating System

A few notes on the heater, since this part is unusual outside Brazil. I could not find the exact same style in the US, maybe because of different regulations. These heaters are common in southern Brazil, where many people drink yerba mate.

The exact model I use is sold in Brazil:

• Portable Water Heater for Tea, Coffee, Mate 127V/220V 800W: https://meli.la/1PsN8pn
  • This is the most portable one I have found with decent power. It is very cheap in Brazil, around US$6, but these can burn out, so I like having more than one.

I also have another Brazilian model:

• Electric Immersion Water Heater 110V or 220V 800W: https://meli.la/1bN6Rz4
  • Even though it is listed with the same wattage, in my tests it heats water faster and reaches a more aggressive boil.

Both can heat 500 ml / 17 oz of water in less than 5 minutes in my tests.

I also like carrying a small thermos: KINTO 20942 Travel Tumbler . It works well for tea and drinking water. I avoid putting coffee in it because it can affect the taste of the water later.

Safety Notes

• Immersion heaters can be dangerous. Never plug one in unless the heating element is completely immersed in water. Also unplug it before touching the water or removing the heater.
• Pay attention to the voltage. In my case, I bought three: two 127V (which I also use in the USA) and one 220V.
• I also carry a small plug adapter for trips to the USA, since the heater has a Brazilian/European-style plug.
• I personally prefer models around 800W. For me, that is a good balance between heating time and how aggressively they heat.
• I am an electrical engineer, so I want to underline this: never plug it in before fully immersing it in water. It can burn out immediately and there is a fire risk. As a curiosity, electric showers are extremely common in Brazil and use the same basic idea, but their power can be up to 7000W to heat water instantly.