Can anyone recommend a good booster-seat type highchair?

[Eaglebird]

Can anyone recommend a good booster-seat type highchair? (one of those ones that fastens to a normal chair, so that your child can sit at the table).
DS is 8 months old, and I'd like a booster-seat thingy we can take on holiday and to relatives' houses, without having to lug a full sized highchair in the boot of the car wherever we go.
He loves to try to stand up, so I use a chest harness in his normal highchair at home to stop him falling out. The booster-seat must have a similar harness, or holes/rings that I can attach a harness to. A 3-point harness probably won't be enough to keep him secure.
Thanks.

We got one like this on the go booster seat but it was padded, not inflating. This might be the new, improved version, but ours has nice blue spots on. Three years and two toddlers later, it now has a big book in it to raise it up and supplement the padding but it is still going strong. It is great for travelling as it is super light weight.

Just saw the bit about the three-point harness not being enough... It has been for us.

Just saw the bit about the three-point harness not being enough... It has been for us.

So embarrassed I posted it twice.

We have this one, it's £££ but brilliant and you can use it with the tray or without, including freestanding on the floor if you need to. It's a 3-point harness but has certainly been fine for DS. Not sure I've ever come across a booster with a 5 point.

i had this one really liked it.

Thanks everyone. Think I'll go for the Concord Lima travel chair.