* Reviewer Information
Name: Mark McLauchlin
Height: 1.76 m (5’ 9”)
Weight: 80 kg (176 lb)
Email: mark at swanvalleyit.com.au
City: Perth, Western Australia
* Backpacking Background
I have been hiking since 2006 with most of my hiking consisting
of day walks averaging 16 - 22 km (10 - 14 mi) and short overnight trips where
I consider myself to be a light hiker with an average pack weight of
13 kg (29 lb).
My preference is for hot dinners, breakfasts of cereals with fresh fruit,
and lunches usually of bars and sandwiches.
* Product Information
Manufacturer: Sedge Warbler
Year of Manufacture: 2008
Listed Weight: Not Listed
Listed Capacity: 300 ml (10 oz)
Measured Weight Total: 110g (3.88 oz)
Measured Weight Lid: 24g
Measured Weight Cup (no lid or cozy): 70g (2.47 oz)
Measured Weight cozy: 14g (0.49 oz)
MSRP: GBP £7.50
* Initial Impressions
The size of the cup was surprising, I had expected
something larger however this does suit my style of hiking which
involves smaller and lighter items. The cup measures 11 cm or 4.3 inches
in height which is comparable to my Mini Maglight.
The lid spout is quite large, 2.5 cm by 1 cm (0.98 x 0.39 in).
FLEJ Solo cups are unique by way of their inbuilt stirring feature.
The Agitor Micro Pump is located on the base of the cup and is activated
by repeated pumping with the finger or by sucking on the lid spout which
creates movement of the liquid inside, as can be see from the images
The Agitor Micro Pump is made from a high quality medical grade
plastic according to the manufacturers website.
The first drink I had in the cup was hot chocolate with milk and
sugar. Once all the ingredients were added I poured in the hot water and
exercised the Agitor with my finger approximately eight times. When the
drink was finished I opened the lid to find there was nothing remaining
in the bottom of the cup. This shows me the Agitor worked as expected.
The cup seems sturdy and hardwearing, easy to clean and very
functional. It is made from a clear plastic that is relatively thick.
The diameter of the base of the cup is smaller than the top. It can be
seen from most of the images the cup walls slope in slightly.
The cup also comes with a removable neoprene cozy to keep the
contents hotter for longer and there are six colours to select from when
purchasing. For this test series I selected the Camo colour.
* Reading the Instructions
The packaging of the cup provides instructions for use and other
general information on the product which are easily understood and
*Illustration courtesy of FLEJ
Features of cup as per the
packaging:Agitor Micro-Pump on-board stirrer.
Microwave and dishwasher safe.
Fits practically all car cup holders.
Thick Grip prevents finger burn.
Generous 300ml (10 oz) capacity.
Hygienic and easy to clean.
Built to last.
Compatible with other FLEJ gear.
"3 Reasons why FLEJ self-stir cups
1. Never find sugar at the bottom of your cup again! On-board
stirring gives a perfectly mixed drink every time.
2. Unlike a spoon which can be forgotten or lost, FLEJ's stirrer
is always where it should be when you need it. Ideal for camping or
3. With FLEJ you can stir with the lid attached reducing the risk
of spillage and scalding. Perfect for in-car or office use."
Agitor Micro Pump in base of cup
* Testing Strategy
The emphasis of my test plan will be on day trips and overnight hikes, which I actively
combine into geocaching. These products will form part of my kitchen for the
duration of the testing.
I am looking forward to being able to take this out with me on my hiking trips, and will be very
interested to see how it performs. I will also use this for hot
drinks in my car.
This concludes my initial report. Please check back in two months for
the results of the field report.
I have found the Flej Solo to be a great companion and most suitable
to day hikes and short overnight trips. This little cup is a big
performer and gets two thumbs up from me.
During all of my hikes listed below I have used the cup for my hot
and cold beverage requirements.
So far I have made approximately 80 hot drinks, yes I am a heavy
drinker, of tea, coffee and Milo and numerous cold drinks generally wine
* Field information
My first hike with the cup was along the Eagle View Walk Trail in the John
Forrest National Park. The trail was made from a granite and clay base
with slightly overgrown vegetation covering some of the track. Elevation
ranged from 50 m (160 ft) to 260 m (850 ft). The temperature started at
20 C (68 F) and rose slightly to 23 C (73 F) during the days walk. Rain
was very heavy for the last 4 km (2.5 miles) so much that water level
was up to my ankles. The total length of the hike was 17 km (10.5
The next three hikes were out to my favourite place, Helena Hut on the
Bibbulmun Track. This loop walk is 22 km (13.7 miles) and can be
completed either in one day or the night can be spent at the campsite
which consists of a shelter, toilet and fire ring. The first two trips
out to Helena the weather was fine, with a minimum of 20 C (68 F) and a
max of 25C (77 F) and no rain was experienced. The trail consists of
some old logging roads with a gravel base. The further you progress into
the walk the trail becomes small and somewhat over
The third trip out to Helena was a little cooler (exact temperatures
unknown) and there was also a small amount of rain on the return trip.
I took it on a hike further south of the state to a place known
as Beedelup Hut also along the Bibbulmun Track. This area is well known
for its cold temperatures, high amounts of rain and lush green
surroundings within the Karri Tree forests. The temperature was around
17 C (63 F) and there was a constant light precipitation the duration of
the hike. This walk was quite short at 7 km (4 miles); having a nice
warm drink was a pleasant treat.
My last trip for the duration of the field report was
along the Coastal Plains Trail in the Yanchep National park. This was an
overnight hike staying at one of the huts along the trail. Trail
conditions were very sandy. Temperatures reached a low of 8 C (46 F)
with a cold wind throughout the night.
* Field experience
The cup appears to be standing up quite well to the large amounts of
use I have been giving it and at this stage I see no obvious signs of
wear that will affect its performance.
It has been washed through the dishwasher the majority
of the time. There have also been occasions when it is dismantled whilst
hiking and cleaned with cold water and it has also been used for drinks
and not washed for several days later to test for stains. I am happy to
report there are no stains as yet and the cleaning process is nice and
The neoprene cozy has started to come apart a little towards the top,
this can be seen in several of the photos if viewed carefully, however
this is not causing any issues and I will continue to monitor it.
I have been cleaning the cozy in warm soapy water every few days and
this seems to be working well.
The Agitor and other various seals in the cup are in great condition
and also show no signs of deterioration.
I have found the cup to be very functional and well suited to my
style of gear packing. I like to stow items inside of others to save on
space and make it easier whilst at camp to locate things.
The images below show how I have been able to store two Milk
Jigglers, two bags of my favourite tea (Australian Breakfast) and four
packets of sugar all inside the Flej solo. This is a real nifty feature.
When using the Flej I have attempted to alternate between using the
Agitor MicroPump with my fingers and using the mouth piece, so far my
preference is to use my fingers as it takes some convincing to suck on
the spout with my mouth with extremely hot liquids inside.
Below images show the Flej in action out in the field.
Making tea I found to be a real pleasure, no manual stirring was needed
i.e. no spoon, and there were no signs of anything left over once the
drink was finished. Initially I was expecting to see some sugar on the
The image to the lower right shows instant coffee being
made with the Flej. I did have some issues here as you can see with the
contents not being fully mixed however I was able to overcome this by
either pouring more hot water on top or by placing the lid on and giving
the cup a slight jiggle.I would like to make mention of my experience with the support staff. There
have been two occasions where I wanted some clarification on an issue
both of which were very promptly and satisfactorily answered the next
business day. My first question was around what the small key hole
located near the mouth piece was for. The response was that this has two
main functions. Firstly it is a breather hole to make a drink flow a
little better at less of an angle and secondly there are plans for
add-ons to the cup which will make use of this feature.
The neoprene cozy works well and does keep my drink warmer for longer
and also prevents my hands from being burnt. It is a nice tight fit
which means the cup isn't at danger of falling through. Getting the cozy
on and off is nice and easy. I simply roll it on or off as opposed to
trying to pull it off. In other words I pull the top edge down over
itself to remove it which turns it inside out and then reverse the
procedure to get it back on again.
The size of the cup, 300 ml (10 oz), was initially something I thought
was going to be difficult to adjust to as normally I would drink close
to double this. I can see the advantage of a smaller volume over a large
one especially as the cup is marketed towards the camping and hiking
community. We are all trying to pack lighter and smaller aren't we?
contact with the Flej was with regards to a leak issue I was
experiencing between the base of the cup and the Agitor. In short the
leak was due to the fact I was not exerting enough force when tightening
up the cup. The support team suggests the base needs to be "jam jar
tight". This did correct the issue. At the time the support staff were
concerned that this could lead to burns if not tightened enough and I
can now see as a result they have updated their FAQ page to reflect
Here is an extract of the FAQ. There is a typo which I have also
alerted them to.
"CAUTION: Please take special care to refit the base properly
by lining up the marker on the side of the cup with the marker on the
base. The base is a tight fit so that children can't accidently unsrew
it. It helps to wet the base before tightening. Failure to fit the base
properly could result in leakage and scalding in the case of hot drinks"
I am really enjoying this great little cup and will continue
to take it out hiking with me and also use it around work and home.
This concludes my Field Report. The Long-Term Report should
be completed by September. Please check back then for further information.
Since my last report was submitted I have only managed to take the
Flej out on one more field trip. This consisted of a day hike,
approximately 22 km or 13 miles. The temperature was mild, 17 C (63
F), and there was no precipitation.
The Flej Solo has become part of my morning hot tea ritual and
accompanies me on my drive to work each day. I find that the 300 ml
or 10 oz capacity to be just right as a first brew for the day.
To date I have made over 300 hot beverages using the Flej Solo. The
contents have included tea, coffee, hot chocolate, red wine, white
port, cordial, water and soup.
Cleaning the Flej is a breeze, either in the dishwasher or by hand.
It disassembles easily which ensures all the components are
thoroughly cleaned and ready to be assembled again.
The Agitor and plastic body show no signs of wear, damage or
staining from its continual and varied use. The durability of the
cup has been excellent.
The fact that I do not need a spoon when using the Flej is still a
great selling point for me. When I am out on day hikes or in the
office kitchen the fact that a spoon is not needed is a real bonus.
I have only one issue with the Flej and that is the stitching on
cozy. It appears as though when sewn during the assembly phase the
machine hasn't run back over the stitch as would normally be see on
other items. This has caused the thread to come undone and the cozy
separate along this sewn edge. For the purpose of the test I have
not corrected this issue however I will do so before my next trip.
I continue to wash the cozy in warm soapy water which is working
well. The cozy really does look clean.
Overall I am extremely satisfied with the Flej Solo and would
recommend it to anyone who is looking for a cup that provides great
thermal insulation, is great for packing your drink consumables
inside of, functionally works and is worried about durability. The Agitor
which is one of the key features that makes this thermal cup stand
out from its competition should not be overlooked.
Things I liked.
No spoon needed.
No more spills.
Great customer service.
Cozy provides excellent insulation.
Very durable plastic.
Easy to clean.
Good for storing consumables in.
Size is just right.
Things I disliked.
Stitching on the cozy needs attention.
The Flej Solo has been a great little cup, I have thoroughly enjoyed
I look forward to the enhancements and add-ons they have planned and
hopefully the opportunity to test these.
Thank you to Sedge Warbler and BackpackGearTest.org for the privilege
of testing the Flej Solo Cup, it's been great fun.
Read more reviews of FLEJ gear
Read more gear reviews by Mark McLauchlin