If it’s too large, you risk spilling water all over you clothes; too small and it’s not a comfortable fit for the mouth. Very handy you can seal it I leave mine in the car on the floor sometimes when I'm finished and there's no room in the cupholder. My only issue is that when I get to the water near the bottom I have to be very careful as it can spill all over me sometimes HAHA.

Plastic can be a tremendously good insulator, has a relatively small footprint compared to glass or ceramic, but it can leach a plastic taste into the beverage the first few times it’s used,” Langdon warns. I like the textured feel of the bottle, which makes it a little less slippery than some steel options and prevents it feeling too cold or hot to the touch. I like the trigger action lid: liquid only comes out if it’s pressed, rendering it completely leak-proof. In such a saturated market, Waterdrop has come up with something slightly different to stand out: Microdrink cubes.

That said, Lululemon is a prestigious fitness brand which I imagine many would be proud to show off.

Well, it keeps your drink at your own preferred temperature - you can customise the temperature setting yourself - and it tells you when your drink has reached that preferred temperature. I find myself wondering how many of the positive reviews I have read are genuine, as they bear no resemblance to my experience. The instruction says use round knife and I used a cake server which wasn't sharp but it managed to damage both collar and the lid. The 'drink hole' is difficult to open and because it is a screw top, the whole top sometimes becomes detached.So, if the lid feels a bit stiff at first, it’ll soon relax once you’ve treated it to a nice cup of coffee.

Why we love it: The Stojo cup is the best collapsable variation we tried, perfect if you hate carrying your reusable coffee cup around all day after taking the last sip of flat white. They’re objectively less attractive than the classic design of the Series 1, with a more rugged, squat appearance and a loop handle.

Of all the bottles I tried, the Yeti Rambler had the best insulation which is why I’ve made it the best for hot water.