Beast Tumbler | Reusable Stainless Steel, Vacuum Insulated Cup | with + 2 Straws & Cleaning Brush | Double Wall Travel Flask Perfect for Hot or Iced Coffee | BPA Free (Matte Black, 30oz)

I bought 2 of these, a 20 oz for my daughter to take to Uni and a 30 oz for myself (currently OOS). I don't often leave reviews, as a lot things these days are mediocre at best and crap at worst. Not these 'beasts'!!! They are amazing! The seal fits really well and is easy to put back on if you remove it for cleaning, as I do. It keeps cold drinks cold for over 24 hours and hot drinks...I had a hot chocolate in mine and forgot it had been made. 4 hours later it was still piping hot, to the point I left the lid open for it to cool down!! The eco friendly straws and cleaning brush are a bonus, you don't often get them included with flasks/mugs (my partner calls then cups, I say he's wrong and they're flasks, but hey, potato potaato 🤷‍♀️ I have bought numerous other brands, both from amazon and other places, in a long search for the perfect flask. And now I have found it. The old saying "buy it cheap, but it twice" is definitely true, as is "you get what you pay for". I actually don't mind paying more, for a product that genuinely does what it claims to do. And this product does. I have a kitchen cupboard full of plastic ones, metal ones, some leak, some are impossible to get clean, some can't go in the dishwasher, some are going rusty....I'm sure you get the picture. These Beast tumblers are worth every penny. I've spent less on others, which ultimately leak and I've spent more on one "dishwasher safe" one that is going rusty around the top now. If you are looking for a high quality flask, that can keep your drinks both piping hot and freezing cold (I'm intrigued about the icecream idea from another review 🤔) THEN THIS IS THE PRODUCT YOU NEED. What's more, there are so many different colours, with colour co-ordinated lids, the whole family can have their own with no confusion over whose is whose. Can't recommend these highly enough 👌

This Beast tumbler is amazing. Keeps my water ice cold. 900ml is a perfect size as well, not too big and not too small. Tested it for leaks by turning it upside down and shaking it. 100% leak proof. I haven't used it for a hot drink yet? Not sure I will as I mainly use it for my filtered water. Haven't used the the straws or straw cleaner either yet. Nice little extra to have nonetheless. Get one you won't be disappointed!

Great size & quality. Love the colour. The lid doesn’t crack like my old one. It’s okay to hold but I’m definitely going to buy a larger one with a handle for ease and use this one for my coffee. The steel straw is narrower than my other ones which is good as I add lemon to my sparkling water drinks and worry about it eroding my teeth with wider steel straws. I’ve only knocked it over once but the lid stayed on and minimal water escaped through the sip hole. The paint hasn’t chipped like my old one. It keeps my cold drinks perfectly cold. My hot drinks hot. My only regret is not buying a bigger one with a handle. If you have smaller hands, I’d recommend a handle one.

I’ve been using this tumbler for a couple of months now, and overall it’s great. It’s definitely leakproof, has a strong vacuum seal and seems quite durable. Plus, its large size is very useful if you drink a lot of water, as you don’t need to refill it as often. It also does a great job of keeping drinks hot or cold for hours. However, there are a few downsides. Firstly, although it claims to be dishwasher safe, after just one run in my dishwasher some of the colour faded in a couple of spots, and it was a short cycle. You can see the spots in the attached photos. Therefore I would not recommend putting it in the dishwasher, handwashing is safest. Secondly, the design doesn’t include a handle, which can make it a little inconvenient, especially when fully filled as it’s quite heavy. You can however buy a handle separately, but that will cost you another £10. Unfortunately, the Greens Steel customer support team is questionable and seems to be selective when responding. I reached out to them via email about the dishwasher issue, and initially they were very responsive, replying within hours, but after asking me to send photos, I haven’t had any response in over three weeks despite sending a few follow-up emails. Overall, I can recommend this tumbler if you want a large, leakproof, vacuum-sealed bottle that keeps drinks hot or cold for hours, but don’t put it in the dishwasher and be aware it’s a bit heavy to carry without a handle. I also sadly cannot praise their customer support team as they failed to assist me.

I kept seeing people going on about these new cups all over the internet and tbh I wasn’t buying into the hype. They look like a thermos flask to me, with a straw so I wasn’t exactly understanding the price or the demand. But curiosity got the better of me and I had a look on here for them to see what magic powers they offered that I was clearly missing from my life. Well, an hour later, I had come to my conclusion and had found a Beast cup/mug on here on a lightening deal. Being as I drink around a litre of coffee a day, I figured I’d buy the biggest one, save me keep having to go make a drink 3 times a day. And so far, I’m impressed. The quality is brilliant, it’s easy to clean, looks sturdy and is not overly heavy. It fits in my drink holder in the car and I can make a coffee at 9am and it’s still hot at 4pm. The lid seems solidly made and spill proof. I’ve not as yet had any accidents but I’m not making any claims to how well it would last if laid down or tipped over with fluid inside. What I can say is when I’m walking around with it, if it’s sealed then I’ve not had any issues with things getting wet. The straw gets a bit hot with hot drinks but I invested in the little rubber tips and that solved that issue. I’m going to look at investing in a handle for it since it’s now a daily staple in my routine. The other half was also so impressed with my find he insisted on getting one too. For anyone who wants a large, thermos mug without the price tag, check out these cups as they are certainly good quality and worth the money.

This tumbler is built for serious temperature control. Whether you're sipping hot coffee on a cold site or keeping water chilled through a long drive, it delivers. The double-wall vacuum insulation keeps drinks hot for up to 12 hours and cold for 24+ hours. Ice stays solid overnight1 . The powder-coated finish gives a solid grip—even with condensation—and the electro-polished interior prevents flavour transfer. No lingering taste from yesterday’s brew. The splash-resistant lid seals tight, and the included straws and brush make it easy to switch between drinks and keep things clean. ✅ Pros Excellent insulation—hot or cold for hours Solid build—doesn’t dent or warp easily Lifetime warranty—backed by Greens Steel1 Includes straws + brush—ready for any drink Dishwasher-safe—easy cleanup No flavour carryover—electro-polished interior Fits most cup holders—despite large capacity ⚠️ Cons Bulky when full—not ideal for small bags Lid isn’t fully leak-proof—splash-resistant only No handle included—sold separately (Beast Handle V1) Premium price—but justified by durability Not suitable for carbonated drinks—pressure build-up risk 🧍‍♂️ Personal Verdict Used this on site and in the van—coffee stayed piping hot past midday, and iced water held up through a full shift. The grip’s solid, the lid seals well, and the straws are a proper touch. For under £25, it’s a beast of a flask that earns its name.

It is so rare to actually purchase something nowadays and genuinely get what you pay for! Or to put it in a better way, something of decent quality. As many cut corners or try to find ways to min-max profit, quality is rare (unless you pay exceptionally high prices for something), which not many of us can do and when you do get excellent quality for a reasonable price it's a lovely and rare feeling :) Pros: •Huge capacity 40oz (1136ml) Over a Litre •18/8 Food Grade Stainless Steel •Insulated Vacuum Layer •Hardwaring Slightly Textured Coating helps me grip. Great colours. •Decent quality Thick, Food and Heat Safe Plastic Lid, With clever leak proof seal and nice simple hinge. •Easy to clean, keeps an entire pot of coffee hot for at least 6 hours, keeps cold drinks cold (Ribena and Ice still had Ice in it all day). •Comes with Two Stainless Steel Straws and a Straw Cleaner. Nicely Packaged with a lifetime guarantee. •Simple, straightforward design, it works unlike other brands with smaller cups that I've tried which leak or break almost immediately. Cons: •Handle (Also cleverly designed and good quality moulding and material) sold separately but I can forgive this because of the exceptional quality and need to recoup material costs for production. To sum this up it inspired me to give it this glowing review which I rarely do, It's easy to maybe look at the price and think it seems a bit high but for less than thirty quid it really isn't, this simple design with quality materials IS NOT cheap to produce, they are making a profit but the price is fair and equivalent to a top end big brand, with I think better Quality and beats a cheap plasticy generic version with poorer materials hands down. Dont spend a fiver and dont spend fifty quid get this instead. Time will tell how well it lasts before the lid looses pressure or leaks or if it scratches, but I can tell for the quality it is, that even under my heavy use it should last for a fair and reasonable time, they do have a guarantee and I'll happily give Greens Steel more money for the next one even if its not under warranty. Buy One it's phenomenal! :)

This mug keeps the warmth so well I need to open the lid for a while and let it cool so I can actually drink. After that, I put the lid on and it will keep warm for so long. Great product, very light and so big. 10/10