Diono Solana Backless Booster Car Seat, 2-Pack (Purple Wildberry)

Two backless booster seats for big kids, 40 to 120 lb, so you can keep one in each car or have one ready for the grandparents. They install with the vehicle seat belt (no LATCH), weigh next to nothing, and have a shoulder-belt positioner and two cup holders. The padded covers come off for the washing machine, which matters more than anything else on this list. This is the Purple Wildberry color.

$34.99 for the pair. Camel puts its all-time Amazon average at $47.80, so this is 27% below what it usually sells for, and it's the lowest price Amazon has ever charged, set on October 10.

4.7 stars across 2,864 reviews, sold and shipped by Amazon.