OSL BlenderBottle® 28oz Shaker | Old School Labs
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Home » Products » OSL BlenderBottle® 28oz Shaker

OSL BlenderBottle® 28oz Shaker


The OSL BlenderBottle delivers silky smooth protein shakes that is perfect for the out-and-about Old Schooler. Whether you’re enjoying our protein powder Vintage Brawn, our 3-in-1 muscle builder Vintage Build, or even your favorite smoothie, this is the perfect addition to your gym bag.

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Key Advantages
Why It Makes Sense
Key Advantages

Imagine packing a shake for the gym, work, or school, only to later discover that the top popped open in transit. (It’s only funny when it happens to someone else.) The amazing worry-free lid technology on this bottle stays secure no matter how many times you shake, rattle or roll it.

Completely leak-proof

Besides leaks, few things in life are more disturbing than when lumps form in your protein shake or (gasp) the powder settles to the bottom! This bottle solves that problem for good with a patented wire whisk made of corrosion-resistant surgical steel. It cuts through the clumpiest powders like a knife through warm butter.

Stop Worrying

Why It Makes Sense

Everything Else Is Just a Shaker Cup

The OSL BlenderBottle® 28oz Shaker has the same industry-leading leak-proof seal, iconic design, and steel wire whisk you’ve come to love from BlenderBottle®. But wait, there’s more!

• Luxuriously comfortable to drink from and prevents embarrassing “protein mustaches”
• Patent-pending carrying loop with ergonomic flip cap and spout
• StayOpen™ flip cap won't close on your nose and GripperBars™ make it easy to hold
• Embossed ounce (oz) and milliliter (ml) markings
• Fits in most car cup holders
• Free of BPA, phthalates, and other chemicals that are hard to pronounce
• Backed by our Golden-Era guarantee and Customer Service

Pro Tips

1. Buy one or more OSL BlenderBottle® shakers: Shaker bottles need companions, too. The upside for you is that it makes living a healthy lifestyle even easier. For instance, OSL customers often buy two or more shaker bottles to always have a clean bottle ready.

2. Try this iced-coffee protein shake: Such taste. Much wow. Mix 1 cup unsweetened almond milk, 1 cup brewed coffee, 1 scoop Vintage Brawn™ protein powder, and some ice cubes.


  1. What's the best way to clean my OSL BlenderBottle®?

    All components of your OSL BlenderBottle® shaker are top-rack dishwasher safe. The BlenderBall® wire whisk should be placed in the silverware bin. Alternately, bottles may be washed by hand in warm soapy water.

  2. How do I properly store my OSL BlenderBottle®?

    We recommend storing it in a cupboard, as you would any other cup, while keeping the lid loose rather than tightly closed to allow it to fully dry.

  3. How can I keep my OSL BlenderBottle® shaker from smelling?

    To prevent your OSL BlenderBottle® shaker cup from smelling, avoid storing liquids for too long and rinse or wash your bottle between uses.

  4. What can I do if my OSL BlenderBottle® shaker smells?

    For stubborn odors, fill your bottle almost to the top with warm water and add a few teaspoons of bleach. Let it sit overnight before rinsing thoroughly. Alternatively, fill the bottle with a mixture of baking soda and vinegar and let it sit overnight with the flip cap open.

  5. Is my OSL BlenderBottle® microwave safe?

    While the plastics used in this OSL BlenderBottle® are BPA and Phthalate-free, microwaving is not recommended. The leak-proof seal can allow pressure to build up inside the bottle when heating, causing the lids or flip caps to open unexpectedly and spray contents. Never microwave the OSL BlenderBottle® with the BlenderBall® inside.

  6. Can I freeze my OSL BlenderBottle®?

    We do not recommend freezing your OSL BlenderBottle® shaker. Like most plastic bottles, it may become brittle and more susceptible to cracking or breaking when frozen. If you decide to freeze the contents, please make sure to leave room at the top, as well as the flip cap open, for the contents to expand.

  7. Can I use my OSL BlenderBottle® to mix hot liquids?

    We don’t recommend that. Hot or warm liquids may build up pressure within the bottle and cause the flip cap to open unexpectedly and spray contents.

More Questions?

If you have any questions about this product please feel free to get in touch. At Old School Labs™, we pride ourselves in the quality of our products and our customer service.

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