Ah OK good point with the saving! I know with my kids it'll be smashed within the month, by accident of course (skeptical)
It’s quite small and this one is not reusable however some people may like that more as it’s harder to take money out encouraging them to save. I guess it is down to preference though.
Don’t know the size of this but you can get similar in Poundland and also a pretty large version for £2.99 and llamas and unicorns for £3.99 at The Range. plus their reusable, with a rubber bung lol