does anyone know either where I can get replacement bottles for a home water cooler (5l & 2.5l), or alternatively, how to clean the ones i have got...... they've been left a while and have a bit of green inside the bottles which doesn't look appetizing!
I would have thought if you buy something like Milton sterilising tablets (like they use for babies bottles) and drop one in and agitate it a bit, it should clean it thoroughly and get rid of the green, just make sure you rinse well after as it is a bleach.
home brew shops will sell you steriliser which is less expensive than Milton. If the green wont come out get some clean sand (boil it in water if in doubt) and add to a little water and agitate. It acts as an abrasive and can easily be rinsed out