My wife requested that I make something that she could tip our shampoo and conditioner bottles upside so you wouldn't have to shake down the product when it gets down to last little bit. Well this is what i came up with.

I thought I would upload it in case anyone else could get some use out of it.

It is made for a 2.5" diameter bottle. I included my OpenScad file so you can adjust the size of the lid and bottle to fit your needs.