diff --git a/js/buoyancy/model/applications/Bottle.ts b/js/buoyancy/model/applications/Bottle.ts
index 435ff2ca..555a55db 100644
--- a/js/buoyancy/model/applications/Bottle.ts
+++ b/js/buoyancy/model/applications/Bottle.ts
@@ -194,7 +194,8 @@ export default class Bottle extends ApplicationsMass {
   public readonly maxVolumeDisplacedProperty = new NumberProperty( ApplicationsMass.DEFAULT_DISPLACEMENT_VOLUME );
 
   // In kg (kilograms)
-  public interiorMassProperty: ReadOnlyProperty<number>;
+  // TODO: rename to materialInsideMassProperty, https://github.com/phetsims/density-buoyancy-common/issues/256
+  public readonly interiorMassProperty: ReadOnlyProperty<number>;
 
   public constructor( engine: PhysicsEngine, providedOptions: BottleOptions ) {
 
@@ -203,7 +204,7 @@ export default class Bottle extends ApplicationsMass {
     const customMaterial = Material.createCustomSolidMaterial( {
       nameProperty: DensityBuoyancyCommonStrings.systemAStringProperty,
       density: ( BOTTLE_MASS + BOTTLE_INITIAL_INTERIOR_MATERIAL.density * BOTTLE_INITIAL_INTERIOR_VOLUME ) / BOTTLE_VOLUME,
-      densityRange: BOTTLE_DENSITY_RANGE
+      densityRange: new Range( 10, 1000000000 ) // TODO: set min lower than 10? https://github.com/phetsims/density-buoyancy-common/issues/256
     } );
 
     const options = optionize<BottleOptions, EmptySelfOptions, InstrumentedMassOptions>()( {
diff --git a/js/buoyancy/view/applications/BuoyancyApplicationsScreenView.ts b/js/buoyancy/view/applications/BuoyancyApplicationsScreenView.ts
index d3cdf9d0..e50cb622 100644
--- a/js/buoyancy/view/applications/BuoyancyApplicationsScreenView.ts
+++ b/js/buoyancy/view/applications/BuoyancyApplicationsScreenView.ts
@@ -113,9 +113,10 @@ export default class BuoyancyApplicationsScreenView extends BuoyancyScreenView<B
     this.transformEmitter.addListener( this.positionResetSceneButton );
     this.positionResetSceneButton();
 
+    // TODO: create in bottle? https://github.com/phetsims/density-buoyancy-common/issues/256
     const customMaterialInside = Material.createCustomSolidMaterial( {
       density: 1000,
-      densityRange: new Range( 0, 1000 ) // TODO: range, https://github.com/phetsims/density-buoyancy-common/issues/256
+      densityRange: new Range( 50, 20000 )
     } );
 
     const bottleControlsTandem = tandem.createTandem( 'bottleControls' );
@@ -140,7 +141,8 @@ export default class BuoyancyApplicationsScreenView extends BuoyancyScreenView<B
       showMassAsReadout: true,
       supportHiddenMaterial: true,
       customKeepsConstantDensity: true,
-      tandem: materialInsideControlsTandem
+      tandem: materialInsideControlsTandem,
+      customMaterial: customMaterialInside
     } );
 
     // This DerivedProperty doesn't need disposal, since everything here lives for the lifetime of the simulation
@@ -149,21 +151,6 @@ export default class BuoyancyApplicationsScreenView extends BuoyancyScreenView<B
     const customDensityControlVisibleProperty = new DerivedProperty( [ model.bottle.materialInsideProperty ],
       material => material.custom );
 
-    let materialChangeLocked = false;
-    Multilink.lazyMultilink( [
-      // TODO: umm...... https://github.com/phetsims/density-buoyancy-common/issues/256
-      // model.bottle.customDensityProperty,
-      // model.bottle.customDensityProperty.rangeProperty,
-      model.bottle.interiorMassProperty,
-      customDensityControlVisibleProperty
-    ], ( density, densityRange ) => {
-      if ( !materialChangeLocked && model.bottle.materialInsideProperty.value.custom ) {
-        materialChangeLocked = true;
-        model.bottle.materialInsideProperty.value.densityProperty.value = density * DensityBuoyancyCommonConstants.LITERS_IN_CUBIC_METER;
-        materialChangeLocked = false;
-      }
-    } );
-
     const customBottleDensityControlTandem = materialInsideControlsTandem.createTandem( 'customBottleDensityNumberControl' );
     const customBottleDensityControl = new NumberControl( DensityBuoyancyCommonStrings.densityStringProperty, customMaterialInside.densityProperty, customMaterialInside.densityProperty.range, combineOptions<NumberControlOptions>( {
       visibleProperty: new GatedVisibleProperty( customDensityControlVisibleProperty, customBottleDensityControlTandem ),
@@ -238,7 +225,8 @@ export default class BuoyancyApplicationsScreenView extends BuoyancyScreenView<B
     ] ), cubicMeters => model.block.updateSize( Cube.boundsFromVolume( cubicMeters ) ), this.popupLayer, true, {
       tandem: tandem.createTandem( 'blockControls' ),
       highDensityMaxMass: 215,
-      supportHiddenMaterial: true
+      supportHiddenMaterial: true,
+      supportCustomMaterial: false // TODO: Undeoo!!
     } );
 
     model.block.materialProperty.link( material => {
diff --git a/js/common/view/MaterialControlNode.ts b/js/common/view/MaterialControlNode.ts
index 6e6adbb2..4ea589c1 100644
--- a/js/common/view/MaterialControlNode.ts
+++ b/js/common/view/MaterialControlNode.ts
@@ -17,7 +17,6 @@ import DensityBuoyancyCommonConstants from '../DensityBuoyancyCommonConstants.js
 import Material, { MaterialName } from '../model/Material.js';
 import { PhetioObjectOptions } from '../../../../tandem/js/PhetioObject.js';
 import PickRequired from '../../../../phet-core/js/types/PickRequired.js';
-import Range from '../../../../dot/js/Range.js';
 import Utils from '../../../../dot/js/Utils.js';
 import densityBuoyancyCommon from '../../densityBuoyancyCommon.js';
 
@@ -37,12 +36,13 @@ type SelfMaterialControlNodeOptions = {
   minCustomVolumeLiters?: number;
   maxVolumeLiters?: number;
 
+  customMaterial?: Material | null;
+
 } & PickRequired<PhetioObjectOptions, 'tandem'>;
 
 export type MaterialControlNodeOptions = SelfMaterialControlNodeOptions & VBoxOptions;
 
 export default class MaterialControlNode extends VBox {
-  protected customDensityRange: Range;
 
   public constructor( materialProperty: Property<Material>,
                       volumeProperty: Property<number>,
@@ -58,7 +58,8 @@ export default class MaterialControlNode extends VBox {
       minCustomMass: 0.5,
       maxCustomMass: 10,
       minCustomVolumeLiters: 1,
-      maxVolumeLiters: 10
+      maxVolumeLiters: 10,
+      customMaterial: null
     }, providedOptions );
 
     super( {
@@ -66,12 +67,7 @@ export default class MaterialControlNode extends VBox {
       align: 'left'
     } );
 
-    this.customDensityRange = new Range(
-      options.minCustomMass / options.maxVolumeLiters * DensityBuoyancyCommonConstants.LITERS_IN_CUBIC_METER,
-
-      // Prevent divide by zero errors (infinity) with a manual, tiny number
-      options.maxCustomMass / ( options.minCustomVolumeLiters ) * DensityBuoyancyCommonConstants.LITERS_IN_CUBIC_METER
-    );
+    assert && options.supportCustomMaterial && assert( options.customMaterial, 'custom material please' );
 
     if ( !options.supportHiddenMaterial ) {
       materials = materials.filter( material => !material.hidden );
@@ -97,17 +93,12 @@ export default class MaterialControlNode extends VBox {
       };
     };
 
-    // TODO: Yar? https://github.com/phetsims/density-buoyancy-common/issues/256
-    const customMaterial = Material.createCustomSolidMaterial( {
-      densityRange: this.customDensityRange,
-      density: materialProperty.value.density
-    } );
     volumeProperty.link( volume => {
       if ( materialProperty.value.custom ) {
 
         // Handle our minimum volume if we're switched to custom (if needed)
         const maxVolume = Math.max( volume, options.minCustomVolumeLiters / DensityBuoyancyCommonConstants.LITERS_IN_CUBIC_METER );
-        customMaterial.densityProperty.value = Utils.clamp( materialProperty.value.density, options.minCustomMass / maxVolume, options.maxCustomMass / maxVolume );
+        options.customMaterial!.densityProperty.value = Utils.clamp( materialProperty.value.density, options.minCustomMass / maxVolume, options.maxCustomMass / maxVolume );
       }
     } );
 
@@ -116,7 +107,7 @@ export default class MaterialControlNode extends VBox {
     const comboBox = new ComboBox( materialProperty, [
       ...regularMaterials.map( materialToItem ),
       ...( options.supportCustomMaterial ? [ {
-        value: customMaterial,
+        value: options.customMaterial!,
         createNode: () => new Text( DensityBuoyancyCommonStrings.material.customStringProperty, {
           font: DensityBuoyancyCommonConstants.COMBO_BOX_ITEM_FONT,
           maxWidth: comboMaxWidth