|Water bottles stored sideways|
I could have adjusted the shelf heights and had them standing up, but it would be hard to access the ones in the back. And sometimes you want the one in the back. That seems to cause them to fall over or out of the cupboard. I also leave the lids off or open so they can completely air dry after they have been put away. The caps and lids that aren't attached are just put in a container on the shelf below. Also easy to find!
Do you store anything sideways?