Ninja promises 'frozen drinks, made simple' with its Ninja Slushi. It's a pricey purchase at £350, so we've tested it to see if it makes delicious slushies or if cheaper frozen drink makers do just as ...

【Frozen Magic Cup】This slushy cup built-in freezing liquid,the mugs will keep your drinks cold rapidly! Simply freeze the slushie cup for 4-6 hours (below 17°F / -17°C). Then, pour in your ...