drink from furniture (CleverRaven#48817)

Co-authored-by: Kevin Granade <[email protected]>

src/game_inventory.cpp

@@ -73,6 +73,8 @@ static const trait_id trait_NOPAIN( "NOPAIN" );
 static const trait_id trait_SAPROPHAGE( "SAPROPHAGE" );
 static const trait_id trait_SAPROVORE( "SAPROVORE" );
 
+static const std::string flag_LIQUIDCONT( "LIQUIDCONT" );
+
 using item_filter = std::function<bool ( const item & )>;
 using item_location_filter = std::function<bool ( const item_location & )>;
 
@@ -667,7 +669,10 @@ class comestible_inventory_preset : public inventory_selector_preset
         std::string get_denial( const item_location &loc ) const override {
             const item &med = *loc;
 
-            if( loc->made_of_from_type( phase_id::LIQUID ) && loc.where() != item_location::type::container ) {
+            if(
+                ( loc->made_of_from_type( phase_id::LIQUID ) &&
+                  loc.where() != item_location::type::container ) &&
+                !get_map().has_flag_furn( flag_LIQUIDCONT, loc.position() ) ) {
                 return _( "Can't drink spilt liquids." );
             }