I love this thread! I have been lurking here a lot lately, since the farm I now board my horse at has a lot of hunters (and my fabulous BO and her family are avid hunters and Whips). I have expressed an interest in learning to hunt at some point, and one of their friends has offered me a horse twice now; drat I couldn’t make it due to work and prior commitments!
But either way, I think as soon as I can I will take them up on this and am so excited. I would love to know a nice way to thank them for loaning me a hunt-on-the-buckle fellow who won’t mind my learning ways. 
The owner of the horse in question that I have been offered is a junior and her awesome mom. So no flask, but would love to give them a little gift in thanks for their kindness. Shoot, I’d also love to give a little something similar to my BO & family for helping me get my confidence up again enough that I would even feel good riding out of a ring! 
Lovely thread!