For anyone on the slimfast plan - buy one of these! It works fantastically for making the milkshakes, thirty seconds of shaking produces a really smooth frothy shake. I had been mixing them up with a fork, they stayed lumpy, then I tried using our mini handheld blender which worked but it's such a faff to take apart and clean it every time so I thought I'd give this a go and it's brilliant - a bargain solution at under a fiver. After use, it just needs a quick rinse out, and I'm sure the shaking burns off a few calories. The markings round the side are also quite useful as 250ml is exactly on the dry vermouth marker on the bronx recipe. I was a bit worried that the top might come loose during shaking but it fits really well and firmly together. It's also fairly robust as I discovered when I dropped it on our kitchen floor the day it arrived. (I'm pretty sure it would make a great cocktail too....)