Can I use the SteriPEN in freezing temperatures Ainsworth Kohler November 08, 2016 11:14 Updated Follow Yes. SteriPENs can be used in very cold temperatures but a little extra care is needed. Keep your SteriPEN and batteries in an inner pocket close to your body. Related articles Does SteriPEN work in snow-melt waters? Can I use the SteriPEN in very hot water, above 120 degF/60 DegC? Can I use the SteriPEN to purify more than one liter of water? Can I use the SteriPEN on anything other than water? Tea? Coffee? Adventurer Opti Comments 0 comments Please sign in to leave a comment.