To help you find the right one for you, we’ve whittled down the options to the ones we think are best. The Smidge cup promises to keep drinks hot for six hours or cold for up to 12 – and we found it delivers for perfectly toasty coffee even if you forget about it for a couple of hours. You’ll want a lightweight, leakproof, insulating container to carry it in safely, and we think this cup is among the best for the job. We found it kept our cold drinks cool for several hours, up to 24 in fact, not that you’ll be able to resist drinking a delicious frappe for that length of time.

There are glass, stainless steel and silicone versions, those that look like takeaway coffee cups and others that more closely resemble a bottle. The cup has a sleek, black design with orange branding and is made from stainless steel, so it is super durable yet compact and perfect for carrying in a bag. It does, however, feature a built-in vent so you can still enjoy the delicious aromas your cup of coffee releases. I am quite the hot drink obsessive, so testing these reusable coffee cups was nothing short of a joy.and you will get a notification from a phone app to say it has reached that optimum point, plus the mug will keep it there for three hours. The Helix twist fit sipper lids are fully sealed at the cup rim and drinking hole, all thanks to the silicone gasket and dual plug mechanism - but it's not guaranteed to be leakproof.

It features a double lid, with both options offering 360-degree drinking for the feeling of sipping from a traditional cup.

This one from Lululemon is designed for both hot and cold drinks, allowing you to use it for both throughout the day.

While we strive for next business day, during busy periods it can take up to 5 business days to dispatch.Oh, and if you do fancy a coffee, you can take the detachable loose leaf tea infuser out – and the mug will fit under most coffee machines.

You can use your KeepCup or Bottle for carbonated or sparkling drinks, just remember that it's important not to overfill as they'll naturally expand and create gas, which causes pressure to build up when it's fully sealed for long periods of time or gets knocked around. Smart tech makes almost every area of our lives that little bit easier nowadays, including on-the-go drinking with the Ember mug². A reusable vessel is a perfect answer for people looking to cut waste without having to kick the caffeine habit. Steam release after sealing may cause condensation within the plug mechanism and pool into droplets on the top of the lid, so we'd recommend you don't carry your filled coffee cup in your bag. Oh, and it's made from a number of the many millions of used coffee cups that the brand have collected from around the country (then cleaned and blended into a new material).And while the purple colourway we tested is now sold out, it’s still avaible in a mustard knit pattern. Baristas will gladly make your regular drink in your own refillable cup, and some retailers even offer discounts or extra loyalty stamps if you have one. If your glass cup or cork band is damaged within 30 days of purchase, we will replace under our accidental breakage warranty. The insulating performance is outstanding, keeping drinks hot for up to 11 hours and cold for 38 hours, perfect for long expeditions (although we’d suggest taking more than one cup because you’ll need more than 355ml to stay hydrated). If you want to spruce up the the outside of your KeepCup or Bottle, or the silicone gaskets of your Bottle or Helix KeepCup have become stained in use, we have found the following cleaning methods to be highly effective.