And that's the last time you'll ever sip a lukewarm smoothie!

We'd like you to meet the best drink bottle in the world.

A big call, yes, but we've tried soooo many and this one not only keeps things hot or cold for 12 to 24 hours, but it's leak proof and lightweight enough for the chilluns, with a sleek, minimalist design.

There is not one skerrick of plastic in it (as you'd expect from us by now) even in the seal of the lid, which is silicone. And the tubular design and wider-than-usual neck make it easy to clean, no really.

What else can we tell you about the Insulated Drink Flask?

• 500ml size
• 100% plastic free
• Keeps drinks cold for up to 24 hours
• Keeps drinks hot for up to 6 hours, warm for 12 
• Precision-built, double-wall insulated vacuum design
• Sleek, matte stainless steel body 
• Silicone ring seal
• Sweat proof and leak proof
• And yes, the opening is big enough to pop a tea bag in, and get it out again (just leave the string out so you can retrieve it).

One giant kick in the pants for single-use plastic water bottle consumption.