Many parents are faced with scenarios where their child has to be picked up by another adult who may not have a booster seat. BubbleBum 
inflatable booster seat can be carried with your child on each journey, should it be a sleepover or carpool. It’s perfect for Grandpa’s car or as an extra set for the Nanny!
BubbleBum, the cost effective, portable, lightweight, brightly colored, inflatable car booster seat for children aged between 4-11, easily deflates and folds flat so that kids or mom and dad can carry it in a backpack or purse, making it perfect for vacations, rental cars, taxis, school pick up or carpooling.
29.99
http://www.bubblebum.co/us/booster-seat/