If you're after a new lunchbox for the kids for school, or one for yourself for work, this Sistema TO GO Lunch Box Cube Max is a bargain at just £5.99 from Amazon. There's free delivery with Prime too!
If you're looking for something smaller for little ones this Sistema 3965 Lunch Slimline Quaddie 1.5L* includes a drinks bottle and is only £4.
This box lets you transport all sorts of food in one go, with a separate lift-off section for your sandwich and then 3 sections and a yoghurt/fruit pot in a separate bottom section. That means you can pack a sandwich, fruit, yoghurt, snack and more all in the one handy compact lunch box, but still keep things separate. It takes up way less room that in your packed lots of different pots as well!
You can't choose the colour unfortunately, as they're sent at random, but at this price it's worth the gamble I think.
There's free delivery with Amazon Prime, and on orders of £20 or more if you're not a member.