I picked this up awhile ago at the recycling center, took the labels off the front and back, and filled it with rainwater. (I used to use a pint canning jar; this is prettier!) For those wondering, it's an empty Don Julio (brand) white tequila bottle.
I'm still wavering on leaving it plain and simple, or decorating the bottle (or just the stopper). Front:(I usually keep the bottle turned *backwards* to hide the lettering...) Back: