I've purchased 1-gallon glass jars at the Container Store. I think they also have other sizes.
Also, at Marshall's (which I thought was just a clothing store), they have a housewares section. I found large glass vessels there (open-head with lid) that have spigots at the bottom. I'm not sure they always have them but I've made several infusions in the ones I purchased and they've worked out very well. They hold quite a bit and the spigots have not leaked at all. A while back, a bartender/friend tipped me off to their availability.
=R=
By protecting others, you save yourself. If you only think of yourself, you'll only destroy yourself. --Kambei Shimada
Every human interaction is an opportunity for disappointment --RS
There's a horse loose in a hospital --JM
That don't impress me much --Shania Twain