Can show me which baby chair you will get for your lo if he/she is 7 months and where to buy ?

If you are looking for something novel, maybe something like this? Saw it at an acquaintance's house warming party. Not too sure what's the brand (she bought it off one of those shopping apps, think it was Wish) and it looks comfortable. Offers the much needed support. It is also inflatable so you can travel with it easily and looks like you can even take it into the bathroom for baby's bathtime. For a more traditional piece, IKEA has a pretty sturdy and reliable baby chair.