my personal favorite, the blue Mason jar.
My personal favorite, too.
I think one thing that helps pull together "country" style is the use of doilies & what used to be called "dresser linens". An embroidered dresser scarf, or a crocheted doily under the lamp, with a handmade quilt on the bed ( even a denim quilt) make the room look "country". Whether you are going for Country French, with lots of white & blues, or more Americana, with the cast-iron pans & crocks, thrift stores are the way that I decorate country without killing the budget.
I think a vase of fresh cut flowers also helps a lot, & those are free if you grow them yourself. I do have a 2 quart glass mason jar, filled with pebbles from the property, where a couple of stems of srtificial forsythia "grow". Helps during the long snow season.