No Refill system available for this product
Simply buy a 150ml refill when re-ordering, which has a cap, and keep your existing pump. Then use your 150ml bottle to refill your 50ml tottle and 10ml jar. Note: the pump is the most complex part of the product packaging and difficult to deconstruct in order to recycle its individual components (plastic, aluminium sheath, inner spring). It will also most likely keep working for quite some time for many bottles to come.