this is the shower gel, which is typically more expensive than bath foam, good price for shower gel,
the bath foam v good at £1,56, usually 2 for £4 at cheapest

250ml bottles, some of the less common ones come in this size like 24h hydrate and dermo deep clean

How many mls?

250ml for £1 is not bad but it's £1.64 for 500ml at Boots which is better value.