The Hydaway Tumbler comes with a neoprene-like sleeve designed to add a layer of insulation around the Hydaway tumbler, while the tumbler lid creates a "partial" vacuum seal similar to a thermo cup lid. This partial vacuum effect happens when putting the cap on any bottle because air cannot enter so, the pressure inside the bottle naturally drops. To create a proper full vacuum though, you would have to evacuate all the air out like you do with vacuum storage bags, using a vacuum cleaner. 

The Hydaway tumbler lid and tumbler sleeve work well at maintaining the necessary vacuum and minimizing heat transfer to the outside. The sleeve provides up to 90% coverage of the tumbler, leaving out the bottom section exposed similarly to the disposable cup sleeve you get when buying a hot drink from a shop. 

While the Hydaway tumbler sleeve doesn't provide 100% coverage, it works better than a paper cup sleeve because the Hydaway tumbler sleeve is thicker (weighs 17 grams) and made of two neoprene pieces stitched together. Compared to a thermo cup though, the Hydaway tumbler is naturally not able to compete.

The Hydaway tumbler lid measures 100mm in diameter and doesn't have a spout but, it does integrate a cut out opening for pouring out liquid and sliding in the included straw, which is also made of food grade silicone and measures 18cm long with a 7mm inner hole diameter. The straw weighs 9 grams. 

The cutout opening of the tumbler lid features a non-detachable silicone rubber flap designed to tightly seal this cut out. This piece of silicone has the word Hydaway and logo engraved on it. The Hydaway tumbler fits well in a cup holder and is pretty rigid, especially with the sleeve. 

You will be able to comfortably hold it without it crushing but, you will need to use the sleeve when drinking hot liquids because the silicone itself isn't insulated and can be too hot to hold comfortably.

The metal-looking rim around the top of the Hydaway tumbler is made of 18/8 stainless steel, which is the same grade most cutlery is made of. 18/8 stainless steel contains 18% chromium and 8% nickel; hence it is a non-magnetic metal. 

The 18/8 stainless steel is double-walled similar to the double walls of a thermo cup, meaning there is a vacuum (no air) in between the two walls. Double walls in thermos are designed as a barrier to prevent heat to escape from inside and outside temperature to seep in. The Hydaway silicone body does not appear to be double-walled though; hence it cannot hold temperate as long as a thermo cup.

The Hydaway Tumbler has the same fold design of a CV gaiter boot and folds just like the folding bellows of an accordion. Compared to the original Hydaway 2.0, the Hydaway Tumbler looks more like a drinking glass - in this case a tall tumbler - wider at the top and narrower at the bottom. 

Because of the folding design, the original Hydaway 2.0 can be flattened flat by swatting it with the palm of a hand. The new Hydaway Tumbler will not properly fold flat when swatted; hence you have to knead each fold with the fingers one fold at a time. Since there is only four folds to work with, the process just takes a few seconds though, so it isn't cumbersome. When flat, the Hydaway Tumbler measures 2.5cm high (including the lid).

Inside the tumbler, there are three line measurement markings: 8oz (237ml), 12oz (355ml) and 16oz (473ml)

The lid's rubber ring gasket can be easily removed with the fingers. You should remove it periodically since residue does build up behind it. When removing the ring gasket, you want to make sure not to use any sharp objects and to keep the right orientation when re-fitting the gasket to make sure the lid snugs securely onto the tumbler. Hydaway doesn't currently sell any gasket ring replacements; hence you want to make sure not to tear it or misplace it.

The Hydaway tumbler and lid attract pocket lint/tissue lint and other types of gnurr very easily like a magnet. It does wash off easily but, you definitely want to make sure to keep the lid on since the inside of the tumbler also attracts gnurr. 

The Hydaway tumbler has a 13.5cm height with 90mm diameter top and 53mm bottom. Weighs 180 grams when empty (220 grams with lid) and 610 grams full of water, including the lid. The Hydaway lid weighs 40 grams. The Hydaway Tumbler and lid are top rack dishwasher safe (the sleeve isn't). The Hydaway Tumbler is available to buy from Kickstarter and will be available on amazon too. 

The Stockholm Plus charging case has a plastic hinge that allows the lid to remain upright 90 degrees. The docking area is raised and made of plastic too and, it features vertical cut outs for resting the earbuds. The pod section of the earbud sits buried under the docking area, while the stem rises slightly above it, making it easy to take the earbuds in and out of the charging case. In between the earbuds, there is a reset button, which is a unique feature typically found on Urbanista true wireless earbuds.

With a lot of true wireless earbuds, you have to remove them from the charging case to activate Bluetooth pairing but not with the Stockholm Plus. Opening the charging case lid triggers bluetooth pairing, which means the Urbanista Stockholm Plus earbuds can be conveniently paired while sitting inside the charging case. The automatic bluetooth pairing feature of the Stockholm Plus charging case is actually useful for times when you don't want to listen to audio but you want the earbuds connected to your phone so, they're ready to use when an incoming call arrives. 

True wireless earbuds that don't have this feature require you having to take the earbuds out of the charging case and waiting for automatic re-connection. With some earbuds this can take up to 8 seconds, which is not ideal when wanting to quickly answer a call from the earbuds. The Stockholm Plus don't have any re-connection delay; hence they re-connect instantaneously and without pausing the music either; hence you can switch between earbuds without any interruptions. You can use the Stockholm Plus earbuds independently too, as two standalone bluetooth earpieces.  

Just beneath the touch control area of the earbud, there is an led that feedbacks battery/bluetooth status. This led does not flash though, during audio playback, which not only conserves battery but, it also doesn't distract anyone sitting next to you. The Urbanista Stockholm Plus can be automatically powered on and powered off by holding down the touch control area for 2 seconds (power on) and 10 seconds (power off). 

Muscle memory is something one develops with everything and true wireless earbuds are no different. Some true wireless share the same control functions, while others differ, requiring you to relearn and get used to a different control setup. The Stockholm Plus control functions are for the most part intuitive so, they are easy to remember. You can answer, end and reject calls from the left or the right earbud. The skip track function performs as you would expect: skip forward (from the right earbud) and skip to previous (from the left earbud).

The Urbanista Stockholm Plus also support volume control, which is adjusted via tap increments; hence every time you tap the control area, the volume goes up or down a notch. The Stockholm Plus volume control is basically performed via single taps, which on a lot of true wireless earbuds means play/pause.

Some earbuds volume control is performed by long touching the touch control area, making this type of volume control much more convenient to execute. When maxing out the volume, the Stockholm Plus earbuds generate an audible beep, which may seem like a small thing, but it actually makes for a better experience because without a volume "max beep" or audio prompt, you end up tapping endlessly wondering to yourself whether you have maxed out the volume or not.

The Stockholm Plus don't have any R/L indicator markings on them, which is probably by design since telling the earbuds apart is easier than with regular in-ear monitors (IEMs). The Stockholm Plus earbuds feature one microphone per earbud, which is located at the tip of the stem. The microphones have a clear pickup with a good DSP chip that does a good job at amplifying your voice, while suppressing sounds around you. 

The Stockholm Plus vented pod design isn't just quirky though. It is also functional because of the larger nozzle opening and bigger sound chamber that accommodates single 12mm dynamic drivers. The Stockholm Plus deliver good bass, although the midrange and treble are more emphasized. The Urbanista Stockholm Plus Bluetooth 5.0 chip only supports AAC and SBC audio codecs. There is no aptX support, which does help lower latency on Android devices. When streaming via SBC, you can expect 4 hours of playtime (2 hours per earbud) when playing audio at 50% volume. The Stockholm Plus have a charging time of 1.5 hours and stand by time of two full days and a half.

The Stockholm Plus are IPX4 rated, which is enough protection for minimal water splashes. If you do plan to sweat on them a lot, or perhaps run with them in the rain, you should definitely consider the Athens true wireless, which are IP67 waterproof. If you like extra features, the London true wireless has them, including Qi wireless charging support. You can buy the Stockholm Plus true wireless earbuds on amazon.