They're both shot flasks. The one with the thumb lever on the side is commonly called English style, and the other one is an Irish style. Probably mid to late 19th century. Fairly common They're sold on sites like Ebay for anywhere from $20 to about $90 depending on quality, and maker. As with any antique, the provenance will affect the value also. There is probably a makers mark somewhere on the spout of them. Used with old muzzleloading shotguns.
Bill