I'm struggling with the water too! like you I'm fine at home but at work its really difficult, I can only drink at break and lunch times as I work in a school, so I can't sit drinking water when I'm supposed to be working with the kids, they aren't allowed water unless its a heat wave and then are they only allowed to take a sip at the start of lessons, so I can't sit there drinking, which only leaves breaktime and lunch, and as I'm on duty 3 times a week at break, can't really go glugging on a litre bottle, when I'm meant to be watching the kids, just about manage a cuppa, which leaves lunch, I'm on duty every lunch as well but do get my lunch hour either before or after, the kids when I just about manage to get a litre down. Thank goodness its weekend, I'll be able to drink to my hearts content.