How to Do Liquid Stacking

Liquid stacking is the process of pouring fluids with different densities on top of one another to create an array of separated ingredients in a bottle. Making a liquid stack is a simple process, but can produce some beautiful and awe-inspiring results. To stack liquids, you simply have to gather the proper ingredients, find the appropriate tools, and use a steady hand to carefully pour your ingredients.

EditSteps

EditMeasuring and Pouring Your Liquids

1. Find an empty 12 ounce (350 mL) bottle with a bottle cap. Find a clean, clear bottle that can hold 12 ounces (350 mL). As long as it has a resealable cap, you can use it. You can use a larger bottle if you want, but you’ll have to adjust the ingredients so that the ratio between the bottle and the liquids inside it remains the same.^[1]
   
2. Dye of water and of rubbing alcohol with food coloring. Use 2 separate mixing cups and pour your rubbing alcohol into 1 cup and your water into the other. Add 1 drop of food coloring to each cup and mix them with a teaspoon. You can use any colors you’d like, but avoid using the same color as your dish soap with your water, since the water will be next to it in the bottle.^[2]
   
   • You won’t be able to see the layer between the dish soap and the water if you dye your water to be the same color as the dish soap.
3. Pour of dark corn syrup into the bottom of your bottle. Measure out your dark corn syrup and use a funnel to pour it slowly into your bottle. Try to avoid letting the corn syrup touch the sides of your bottle, as the residue may make stacking the next set of ingredients more difficult. Wait 3-4 minutes to let the corn syrup settle.^[3]
   
   • You may have to wait longer for it to settle if you hit the sides of the bottle while you were pouring it.
4. Wash your funnel with warm water and dry it. You don’t want any dish soap mixing with the corn syrup, or you could risk mixing your bottom layers together. To prevent mixing, wash your funnel under warm water and scrub it with a clean sponge. Dry it with a paper towel or dish rag before using it again.
   
   • Wash and dry your funnel after each use.
5. Tilt your bottle and pour of dishwashing liquid into the container. Measure your dishwashing soap out. Place your funnel into the mouth of your bottle and tilt it towards you so that the funnel is aimed at the side of the container, just above the corn syrup. Pour your dish soap slowly and carefully. Avoid pouring it directly into your corn syrup. Wait 2-3 minutes to let the dish soap settle.^[4]
   
   • You need the dish soap to hit the side of the bottle first because you want to maintain the viscosity at the surface of the corn syrup. If you hit it directly, it may not stack.
   • You can tell the dish soap is settled when the bubbles stop moving.
6. Add of water carefully on top of the dish soap. Wash your funnel and dry it with paper towels again to remove the dish soap residue. After your dish soap has settled in the bottle, tilt it slowly towards you and use your funnel or the measuring cup to slowly pour your water down the side of the bottle. Wait 30-45 seconds to let the water settle.^[5]
   
   • Take your time when pouring the water. It’s a lot thinner than the dish soap so it will pour more quickly.
7. Drop of vegetable oil in with a baster. Use a baster to soak up your vegetable oil. Hold the point of the baster above the top of the water. Slowly squirt the vegetable oil on the side of the bottle and let it pool above the water. Continue to squirt the vegetable oil out until your baster is empty. Let it settle for 30-45 seconds.^[6]
   
   • Once your bottle gets filled more than halfway, it’s hard to tilt it without spilling your layers. If you have a bigger bottle, feel free to continue tilting it. Otherwise, use the baster.
8. Finish your liquid stack with a layer of rubbing alcohol. Wash your baster thoroughly with warm water and soap before filling it with your rubbing alcohol. Carefully place it on the side of the bottle, above your layer of vegetable oil. Slowly squirt it out and let it settle for 30-45 seconds.^[7]
   
   • Put the cap on your bottle and close it.
   • You will have 5 layers of liquid that are all different colors beautifully separated in your bottle!
9. Flip the bottle upside down to watch the liquids resort themselves. With the bottle cap tightly secured on top of your bottle, turn the bottle slowly in your hand to flip it upside down. You will be able to watch the different liquids resort themselves in the original order that you poured them. Flip the bottle as a cool trick to show your friends, or as a part of demonstration on density.^[8]
   
   • This will only work if you do it slowly, and you can only do it once or twice before the layers mix past the point where they’re separated.
   • Your liquid stack won’t stay together forever, so don’t do this with the intention of making a decorative item for your home.

EditTrying Variations on the Project

1. Do a simple version of the experiment with oil and water. You can perform a rudimentary version of this experiment by using only water and vegetable oil to demonstrate the fundamental principles of density and viscosity. To stack oil and water, fill a bottle or clear bucket halfway with water. Fill the rest with oil. The 2 liquids will separate on their own.^[9]
   
   • If you’re simply trying to demonstrate what density and viscosity are, you don’t need the full 5 layers. Use oil and water to simply get your point across.
2. Repeat the process using more layers of liquid to make a bigger stack. You can make a 7-layer version of a liquid stack by using of each ingredient and adding 2 additional layers. Start with honey instead of using corn syrup and end with lamp oil on top of your rubbing alcohol.^[10]
   
   • In the 5-layer version of the project, you can use honey as a replacement for corn syrup if you don’t have any laying around.
3. Skip the food coloring for a more subtle effect. Try doing the experiment without adding your food coloring to the water and rubbing alcohol. This will create 2 totally transparent layers, which will let light pass through and make your colorful sections stand out more dramatically.
   

EditTips

• The same principles at work here can be used with ingredients of different densities to make layered alcoholic drinks.
• If the liquids aren’t stacking after they settle, it may be due to the fact that your corn syrup isn’t thick enough. Try again, this time adding of sugar to your corn syrup.
• Use your liquid stack for a simple science project. Liquid stacking demonstrates a few important scientific concepts. Specifically, it illustrates how density allows different liquids of different masses to be sorted without using different containers. It also shows the importance of viscosity in keeping layers separated from one another.^[11]
• Liquid stacking makes for an interesting presentation as well. If you have to present an experiment at school, liquid stacking is a good idea since it requires few materials and little effort.

EditThings You’ll Need

• Measuring cup
• 2 Mixing cups
• Empty bottle
• Funnel (optional)
• Baster
• Corn syrup
• Dish washing soap
• Water
• Oil
• Rubbing alcohol
• Food coloring

EditRelated wikiHows

• Make a Lava Lamp with Household Ingredients
• Make Layered Shots
• Make Rainbow Cupcakes

EditReferences

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via Peter