Suggestions for a good portable high chair

My kids had a booster seat that folded flat for storage, came with a detachable tray (to push up to table if you didn't need the tray) and worked on a variety of seats. I would recommend that because it would work in your dinette, outside on a *stable* folding chair and would be handy to take into restaurants if that options arose.

I want to say it was Step 2 or one of those. Came in multi primary colors (that's probably changed with the times). Very handy.