Eagle Energy Vape (box of 10)

Is a shot of coffee too boring? Is there too much liquid in a can of Coke? Well, have we got the unnecessarily complex disposable battery-powered gadget for you: the Eagle Energy caffeine vaporizer.

Inside each Eagle Energy vape is a tiny cartridge of liquid caffeine -- 3ml of liquid, 0.08 per cent caffeine per millilitre -- that's atomized just like the liquid nicotine juice in a regular e-cigarette, and delivered direct to your bloodstream through your lungs. A 14500-sized battery cell (the same size as a AA) with a 800mAh capacity is good for 500 puffs of "no sugar, zero calorie, 100 per cent nicotine free" energy. That's 25 to 50 cups of coffee by our measure, which makes the Eagle Energy vape good value if you're looking for a quick caffeine hit.

If you do just want that caffeine buzz, hitting an Eagle Energy vape does give you one without the added bloat of the milk in a latte or the 39 grams of sugar in a can of Coke. It's like Soylent for caffeine. Each individual inhaler isn't rechargeable, though -- you're just meant to throw it away once it has run out.

The vape tastes surprisingly like a Red Bull, and caffeine-tolerant coffee drinkers might need between 10 and 20 pulls to notice the effects. As well as caffeine, there's also a blend of taurine and ginseng, which explains the familiar taste. And you do apparently get that distinctive cloud of vapor.