Double Infant Car Seat Carrier

car seat
a seat in a car
Soup is the second album by the American rock band Blind Melon, released shortly before vocalist Shannon Hoon's fatal drug overdose, making it his final album with the band. Thematically, the album is much darker than the band's multi-platinum debut.
A car seat is the chair used in automobiles. Most car seats are made from cheap, but durable materials, made to withstand as much beating as possible. The material for these seats is usually used for the back of the seat, as well as the part where one's posterior goes.

double
Designed to be used by two people
a base hit on which the batter stops safely at second base; "he hit a double to deep centerfield"
downward and forward; "he was bent double with pain"
Consisting of two equal, identical, or similar parts or things
having more than one decidedly dissimilar aspects or qualities; "a double (or dual) role for an actor"; "the office of a clergyman is twofold; public preaching and private influence"- R.W.Emerson; "every episode has its double and treble meaning"-Frederick Harrison
Having twice the usual size, quantity, or strength

infant
A very young child or baby
Denoting something in an early stage of its development
(infancy) the early stage of growth or development
baby: a very young child (birth to 1 year) who has not yet begun to walk or talk; "the baby began to cry again"; "she held the baby in her arms"; "it sounds simple, but when you have your own baby it is all so different"
A person who has not attained legal majority
An infant or baby is the very young offspring of humans. A newborn is an infant who is within hours, days, or up to a few weeks from birth.