At scale Underground Thermal Energy Storage is a fraction of the cost of storing energy for heat in batteries, can store heat for a long time. There is more wind in winter so such energy storage does ...

HeatStore technology — how it works The main concept behind Ninja’s Perfect Sip travel mug is the idea of bringing a scorching-hot drink down to a sipping temperature in minutes.

News Money Saving Money saving and offers Ninja fans 'floored' by how cheap gadget that keeps tea and coffee hot 'for hours' is in January sale "The cup is stylish and keeps drinks hot for quite a ...

A Ninja travel mug has received rave reviews from commuters who say it 'keeps drinks hot for hours' even in winter - and it's 'leak proof' so can be kept in your work bag. The Ninja 400ml Sip ...

Lifestyle Shopping Savvy shoppers get Ninja £30 'perfect' travel mug for under £4 in January sale The innovative product was only launched in the UK in December but is already available at a ...

What's On Shopping Ninja Kitchen Ninja travel mug on sale for less than £4 after money-saving hack The Ninja 'Sip Perfect' travel mug launched recently and it already has a devoted following ...

What's On Shopping shopping Shoppers snapping up £30 Ninja leakproof travel mug for less than £4 in Boxing Day sale Clever bargain hunters have found a way to save even more on one of the brand ...

Ninja has announced huge savings with the launch of its Boxing Day sale, and savvy bargain hunters have found a way to get the £30 leakproof travel mug for under £4 ...

Beyond its leak-proof lock, it boasts a novel HeatStore technology that rapidly cools beverages to the ideal sipping temperature in mere minutes and maintains it for hours on end, reports Wales ...

What's On Shopping Shopping Shoppers snag £30 Ninja leakproof travel mug for less than £4 in January sale Ninja has unveiled a huge January sale packed with deals but clever bargain hunters have ...

The Sip Perfect Travel Mug in white (Image: Ninja) Despite only being on sale for a few weeks, the Sip Perfect has an average rating of 4.7 out of 5 stars on Ninja's website with shoppers praising ...