- This Larq PureVis water bottle's 500 ml capacity helps you stay hydrated all day- It uses UV light technology to kill 99.99% of bacteria and viruses- It's insulated so it keeps drinks cold for up to 24 hours and hot for up to 12 hours- The double-walled stainless steel construction means there won't be any messy spills- It lasts up to one month on a single charge - then just top up back up with the USB charger