Yes, me too. We only buy half gallon jugs most of the time, and I prefer gallon size for wintersowing. I'll get my friend to save some for me. She buys all of her water for drinking or cooking in gallon jugs, so they're always nice and clean. I can't wintersow much this year, I'm fresh out of garden space. But I'll definitely do a few jugs of annuals if nothing else.
I know I'm pretty low on ProMix too, and I still have to do coleus cuttings for winter, so I'd better pick up more soon.
Karen