Can I use my SteriPEN on water with ice in it?
No, we do not recommend you use the SteriPEN on water with ice in it because the UV light can not pass through the air bubbles or impurities in the ice. If the water was treated before ice cubes were made it you would be ok. We recommend removing the ice from the drink before treating it. You could also allow the ice to melt and then treat the water.