drawer is fully advanced within the housing this contact upon full advancement of the drawer into the housing also displaces rod 23 rearwardly against the bias of compression spring 21 so as to preload the spring to bias rod 23 and hence drawer 1 outwardly as a result upon disengagement of first catch 7 from second catch 9 the drawer will extend at least partially from the housing u2014 so long as nothing is blocking it from doing so under the aforesaid condition that the drawer is not blocked from moving outwardly a spring biased return of first catch 7 to its original angular orientation upon a release of push button 5 will not cause a reengagement of first catch 7 with second catch 9 thus drawer 1 will remain free to be manually extended further out of the housing to allow a user full access to the additive storage compartments of the drawer on the other hand in a condition that drawer 1 is blocked from moving outward at a time that push button 5 is pressed first catch 7 remains in a position to be biased back into engagement with second catch 9 upon a release of push button 5 whereby the drawer remains secured within housing 3 the foregoing arrangement is of highly significant functional consequence namely it can serve to avoid a situation where a person brushing by or up against the appliance inadvertently cause the drawer to open move outwardly with an occurrence of u201c brush by.