Can you post a link to the store that carries this bottle? It could be new, but it was in with a tote full of 1940's mason jars. Seems odd that it would be mixed in with them, but anything is possible at yard sales.
It'd be very difficult to find this exact bottle online, since there's very little to narrow down the search. If there was some embossing on it of any kind, that might help, but -
It's not unusual that you found it mixed in with those older mason jars. It's a yard sale, so they probably figured, "well I'll just make a jars/bottle box", and didn't discriminate between different ages, etc.
If it was old, the closest thing that this would resemble would be an English bottle made on an Ashley-type machine. These bottles often have offset seams like yours (from the finish being moulded separately), some waviness to the glass (yet more pronounced), and judging from the examples I've dug/seen, remarkably clean glass. I've dug them out of pure black ash and still there was no haze or anything on the glass surface (if anyone would like to chime in and tell me how in the world they did that, I'd love to know).
Your bottle appears to lack any bubbles in the glass (that's another can of worms though, because there are plenty of centuries-old bottles without bubbles) and doesn't seem to have any base wear at all, which would be telling of years of use (another can of worms). MOST IMPORTANTLY, is that it doesn't have 'that look'. I'm no expert, but I do know that when I first started collecting, I could almost instantly spot this kind of stuff from a mile away. For me, most of all, it's the colour. These modern pieces always have this weird green-grey look to them.
Here are some older English machine-made bottles. They are so darn clean you'd think I bought them from Ikea last week, and yet they are all dug, and around a century old:
