This is my Ribbon Vase, it has a reservoir for water at the bottom and a stem guide at the top. It can hold either a single stem or maybe a small bunch, up to about 3 or 4.

When you print make sure you have supports enabled. I found the best type of supports are the organic ones.

I printed in Marble PETG at 0.2mm layer height with 4 wall loops to make it watertight.