Bottle Shape White object flying through sky

I saw a white object flying through the sky. It's a clear but cold day. At first I thought it was a plane but the shape was wrong. It was flying too high to be a helicopter. It was flying on a consistent and smooth trajectory like a plane, but there was no trail behind it. The straight flight and path also did not seem consistent with a consumer drone. There also did not appear to be wings. It appeared more the shape of a bottle. I've uploaded some photos I took with my camera phone fully zoomed in. Altitude seemed around or slightly lower than a plane would usually be.