Ordered one of these following the amazon deal posted the other day. It really is quite amazing the way the mug works, I wasn’t sure what to expect but it really is great.
It's actually cheaper than Amazon because it's £5 per mug +£2 postage for full order, so buying multiple mugs is cheaper... also if you click checkout with PayPal straight away the PayPal screen doesn't show postage charge... not sure if it will actually charge or not... Edit: unfortunately it does still charge postage
Comes out as the same price on Amazon when you add postage so although cheaper than Amazon it's not really, just smart marketing. Show item as less than competitor but add the rest in postage. It's like when a company is giving away a free item for example a watch but then they charge £10 for shipping, you are effectively paying £10 for the watch. Good find regardless.