Not sure how practical this is, but for impact, the Shark Sleeping Bag by Luna & Curious x The Miniature Knit Shop is hard to beat.
Yes, it looks like your little one is being eaten by a shark. Is that a good thing? Certainly not in reality, but this knitted version, handmade in England, isn’t going to do any harm. On the contrary, it will keep your little one very snug in the cold weather.
It firs a newborn to nine months, after which it can be used as storage or a laundry bag. £90 is the price.