I received complimentary products to provide this post. All opinions are my own.
My daughter will be 7 in December. We want to keep her in a five-point harness as long as possible, but she can sit in a booster seat. I was recently introduced to mifold. mifold is the most compact booster seat I have ever seen and makes traveling a breeze. Perfect for use in carpooling or taxis (or uber/lyft). It is so compact that it can fit in your purse or diaper bag.
Instead of bringing the child up like traditional boosters, mifold works by bringing the seat belt down. You can not use just a lap belt with mifold, so it is not recommended for air travel. Being so compact, I was worried about the quality, but it is still very heavy duty and very well made.