Prince Lionheart's Stroller Gate check bag. Here is why. How many of you have been the last ones off the jet bridge waiting for the baggage handler to hand deliver your stroller? We've been there and done that one too many times, so we thought we'd try to improve our chance of getting faster service from the esteemed baggage handlers with a personal plea. The bag is big enough to hold the biggest of car seats so there is extra room to stuff in a blanket or other items. Folds up compactly in its integrated drawstring pouch.