It took five days to receive my order from Germany. I live in the southern US.

One bottle should last a month, but you need to follow the directions on how to dispense* it, or a huge drop will come out sideways and miss your eye. I had many land on my face at first, and I’ve been putting drops in my eyes for decades.

( * Squeeze the bottle. Turn it upside down and stop squeezing. You’ll hear an “air sucking” sound. Squeeze again to dispense a tiny drop.)

The protocol is one drop in each eye, four times/day. No more, no less.