Whether you've started the new year keen to up your exercise game or your resolution is just to stay more hydrated, drinking water is a key part of staying healthy. Carrying a bottle of water while on the go is a great way to keep up the habit but, as many of us know, bottles can either be cumbersome or prone to leaking in bags. Shoppers keen to find the ultimate leak-proof option have been turning to one of foodie brand Ninja 's latest launches and, thanks to a new deal, it's available at its