Use "loosener" in a sentence

1. "It seems to me that with all this talk of ours our tongues are sticking to the roofs of our mouths; but I have a pretty good loosener hanging from the saddle-bow of my horse," and getting up he came back the next minute with a large bota of wine and a pasty half a yard across; and this is no exaggeration, for it was made of a house rabbit so big that Sancho, as he handled it, took it to be made of a goat, not to say a kid, and looking at it he said, "And do you carry this with you, senor?"