YINJOYI Travel Mug Reusable Coffee Cups Thermal Insulated Vacuum Insulation Smoothie Cup Stainless Steel Bottle for Hot Cold Drinks with Lid (Blue, 510ml)

Excellent quality and design. Very comfortable to hold. 100% leakproof due to a great seal and locking mechanism- even when tipped up. It keeps the drink warm for several hours. Great range of colours. I use mine everyday and wouldn’t be without it.

I was sceptical about this product however it is a really good product. Keeps hot drinks warm for ages and is leak proof. Nice size also.

These travel mugs are great for keeping drinks hot for a long time. They look nice and have great colours. Nice and easy to clean too! I have purchased 2 of these, one black, one teal. The black one is perfect with no leaking. But annoyingly the teal one does leak from the lid so any slight tilt, and it spills out the top! Not sure if I was lucky to get a non leaking one… or unlucky to get a leaking one! 😅 Other than that, these are great travel mugs!

Great insulated mug at a good price. Keeps the drink hot for a good time and nicely made.

Love these. So much so I now have 2. Went for the bigger option because who doesn’t love more tea! Brilliant seal. I have chucked these in my bag and knocked them over but no spillages. Fit in cup holders etc. keep drinks hot for a few hours and warm for a couple more after that. I like how they feel to drink out of. No weird dribbles anywhere when drinking. 100% would recommend.

I've had my mug for over a year (and bought hubby one in another colour). They are by far the BEST we've ever had. They have an excellent screw top lid; they fit in the car holder; well insulated so drink stays hot; never too hot to hold and can be sealed to not spill if in a bag or gets knocked over. Definitely money well spent and I can't recommend more highly!

This is an honest to god amazing cup!! Keeps my drinks hot for HOURS!! Which in my very busy job is an absolute god send!!

I bought 4 different makes of these travel/insulated cups/mugs, they all function pretty much the same, stainless steel double walled lining with some sort of either paint/laquer/plastic coating and all sorts of caps with different stoppers. None of them leaked when shaken up and inverted with hot liquid inside, but then i wouldn't expect them to as they are all brand new, only time and use will decide how resilient the seals are. In terms of heat retention (I wasn't interested in keeping drinks cold) I tested them all the same way, preheated each mug with boiling water and then poured 350ml of boiling water in, and sealed them. I can only say that the claims made by all the manufacturers that these devices keep dinks hot for hours is absolute twaddle and misrepresentation. Buyers who reviewed these mugs claiming that their drinks stayed hot for hours certainly have no understanding of the word “hot” After two hours the contents of all of the mugs had dropped in temperature to around 50-55c…that is not “hot” in the understanding of “hot” tea or coffee and reviewers are greatly exaggerating the performance of these mugs. If you make a hot drink like tea or coffee, it will be pretty much only warm after 2 hours. If you like your hot drinks hot you would need to consume them within an hour and a half or less for them to be reasonably described as “hot”. All of these type of dual walled stainless steel mugs, no matter what make or design…or price, are going to be around the same or worse performance, quite disappointing actually. I'm afraid if you want hot drinks to stay HOT for a few hours you will have to go back to the old fashioned Thermos flask situation, and by that I mean the glass walled Thermos & unfortunately they are prone to shattering if dropped or abused but they at least do what it says on the “tin’ I really don't know why when buyers review these things they make wildly exaggerated claims about drinks being hot “hours” later, its just simply not true, if you like tepid tea and coffee, fine, I don't, hot drinks should be hot and cold drinks should be cold.