BubbleBum Inflatable Booster Car Seat – Foldable, vs Cosco Kids Topside Booster Car Seat, Pack of 2,
Updated August 2026 — BubbleBum Inflatable Booster Car Seat – Foldable, wins on portability and width, Cosco Kids Topside Booster Car Seat, Pack of 2, wins on weight and height.
The BubbleBum offers superior portability and comfort, making it a better choice for travel, while the Cosco provides easy maintenance and two seats in one pack.
Why BubbleBum Inflatable Booster Car Seat – Foldable, is better
Portability
BubbleBum packs down smaller than any rigid booster.
Comfort
BubbleBum features a soft, inflatable cushion.
Safety
BubbleBum is independently crash tested.
Why Cosco Kids Topside Booster Car Seat, Pack of 2, is better
Maintenance
Cosco has a machine-washable seat pad.
Value
Cosco offers two seats in one pack.
Weight
Cosco is lightweight and easy to move.
Overall score
Specifications
| Spec | BubbleBum Inflatable Booster Car Seat – Foldable, | Cosco Kids Topside Booster Car Seat, Pack of 2, |
|---|---|---|
| Price | $39.99 | $50.38 |
| Weight Limit | 40-100 lbs | 40-100 lbs |
| Crash Test | Yes | No |
| Pack Size | 1 | 2 |
| Washable Cover | No | Yes |
Dimension comparison
Overview of the BubbleBum and Cosco Booster Seats
The BubbleBum Inflatable Booster Car Seat is priced at $39.99, while the Cosco Kids Topside Booster Car Seat costs $50.38, making the BubbleBum about 21% cheaper than its competitor. Both options are designed for children weighing between 40-100 lbs, but they differ in their design and features, which cater to different needs.
Design and Portability
The BubbleBum is designed for ultimate portability, packing down smaller than any rigid booster seat. This inflatable booster fits easily into a backpack or even a glove box, making it ideal for families on the go. It’s perfect for travel, whether using rideshare services or renting cars. In contrast, the Cosco Topside is lightweight and compact as well, but its design does not offer the same degree of portability as the BubbleBum. With the Cosco, you get two seats in one pack, making it a practical choice for families needing multiple boosters.
Comfort and Usability
The BubbleBum features a soft, inflatable cushion designed to eliminate hard plastic edges, which can be uncomfortable on long journeys. This focus on comfort helps to reduce complaints from kids during extended rides. The Cosco Topside also includes plush padding for a comfortable experience, but it is a rigid seat. While the Cosco provides a good level of comfort, it may not match the unique, cushioned experience offered by the BubbleBum, especially for sensitive children.
Safety Features
Safety is paramount in any car seat, and both the BubbleBum and Cosco Topside meet the necessary safety standards. The BubbleBum has been independently crash tested and exceeds federal requirements, providing an extra layer of protection for children. The Cosco Topside is also designed to keep seatbelts properly positioned, but it lacks the independent crash testing certification that sets the BubbleBum apart. Parents may find the added safety assurance of the BubbleBum appealing, especially for frequent travelers.
Maintenance and Cleanliness
In terms of cleanliness, the Cosco Topside has a machine-washable and dryer-safe seat pad, making it easy to maintain. This feature can be particularly beneficial for busy parents who need quick and efficient ways to clean up after spills or messes. The BubbleBum does not provide specific cleaning instructions, which might make maintenance slightly more challenging. For parents prioritizing easy cleanup, the Cosco may hold an advantage.
Awards and Recognition
The BubbleBum has received prestigious awards, including the NAPPA Award and the JPMA Innovation Award, which speak to its innovative design and safety features. This recognition can be a deciding factor for parents looking for a product that has been vetted by industry professionals. The Cosco Topside does not mention any awards, which may lead some parents to feel less confident in its overall design and safety.
Price Comparison
The BubbleBum is priced at $39.99, whereas the Cosco Topside is available for $50.38. This $10.39 difference makes the BubbleBum approximately 21% cheaper. For families on a budget, the cost savings from choosing BubbleBum could be significant, especially if they are looking to purchase multiple seats. While the Cosco offers two seats in a pack, the per-seat cost is still higher compared to the single BubbleBum option.
Which should you buy?
Choosing between the BubbleBum Inflatable Booster Car Seat and the Cosco Kids Topside Booster Car Seat ultimately depends on your family's specific needs. If portability and comfort during travel are your primary concerns, BubbleBum offers a unique advantage with its inflatable design and independent safety testing. However, if you prioritize easy maintenance and the convenience of having two booster seats, the Cosco Topside may be the better choice. Both seats are designed for safety and comfort for children weighing 40-100 lbs, but the differences in design, portability, and price could sway your decision.

