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We recommend the Just Move 20 oz. Shaker Cup as the top pick for fitness enthusiasts who need built-in compartments for powders and pills, with the Just Move Juice Box as a solid alternative form factor. Both are built for integrated storage, reliable mixing, and simple cleanup. The main trade-off: plastic models skip cold retention, so pick an insulated option only if you need your shake to stay cold for hours.
TL;DR:
- Stacked jars are better suited for carrying multiple servings or supplements, but add bulk to your gym bag compared to single bottom jars.
- Plastic shakers are lightweight, dishwasher safe, and easier to maintain, while stainless steel models offer insulation at the cost of additional weight and hand-washing.
- Proper cleaning and thorough drying of all compartments and seals are essential to prevent mold and odor buildup over time.
- Most 100 cc jars hold about one scoop of protein powder, so size up if your servings are larger or you carry pills separately.
- For effective mixing and easy cleaning, choose shakers with removable agitators and replaceable gaskets, and avoid models with hard-to-reach crevices.
Compartmented shakers generally come in three formats, and each one solves a slightly different problem. Bottom screw-on jars attach underneath the main bottle and work well for a single extra serving of powder you want ready for later. Stackable jars, often called ProStak-style systems, let you snap on multiple chambers so you can carry breakfast, lunch, and post-workout servings in one unit. Lid-mounted pill trays sit on top and are built specifically for capsules and tablets rather than powder, keeping your supplements separate from anything that might clump or get sticky.
Capacity varies by design. Smaller compartments hold around 35 grams, which fits a light powder scoop or a handful of pills, while larger jars in the 100 to 150 cc range can hold roughly 1 to 1.5 scoops of protein, according to BlenderBottle’s ProStak product page. That range matters because a single scoop of most protein powders runs close to one full jar, so if you take two scoops per serving, a single small jar will not be enough.
Here is how the three formats stack up for everyday use:
If your day involves a single shake, a bottom jar covers it. If you are managing multiple servings or a full supplement stack, stacked jars or a combination with a pill tray will serve you better.
The way a shaker mixes powder affects both clump control and how much time you spend cleaning afterward. Wire-ball whisks are the most common mixing tool, and they do a reasonable job breaking up clumps, but they can rattle loudly and collect residue in hard-to-reach curves. Removable agitators, which snap into the lid or double as an infuser, tend to mix more evenly and are easier to rinse clean, according to a 2026 review of insulated shaker designs. Built-in agitators molded into the bottle itself cut down on loose parts but can be harder to access for a deep clean.
Material choice changes the maintenance routine too:
Threads and gaskets are where leaks start. Thin, single-layer gaskets wear out faster, and threads that do not seat tightly on the first try tend to loosen with repeated washing. According to a guide on protein shaker maintenance, residual protein buildup in threads can also cause compartments to stick or seal unevenly if they are not cleaned thoroughly after each use.
Pro Tip: Before buying, check whether the brand sells replacement gaskets separately. A bottle with no spare parts available becomes disposable the moment its seal wears out.
Choosing the right model takes less than a minute if you run through these questions in order:
For sizing, remember that most 100 cc jars hold close to one full scoop of standard protein powder, per BlenderBottle’s product specifications. If your scoop runs larger than average, size up to the next jar option.
Watch for red flags before you buy: bottom caps that feel stiff to twist, a single thin gasket with no backup seal, hidden crevices that are hard to reach with a brush, and agitators that cannot be removed for cleaning. Any one of these is a sign the bottle will become harder to maintain after a few months of regular use.
Getting the most out of a compartmented shaker comes down to routine. For packing, keep wet and dry ingredients separated: load your protein powder into the main compartment only right before you mix, and use the smaller jars for pills or a second dry serving you will add later in the day; learn more tips on where to store protein powder so it stays fresh. For an all-day setup, pack your morning capsules in the pill tray, your midday powder in a stacked jar, and leave the main chamber empty until you are ready to shake.
After use, disassemble every compartment, hand-wash the threads and lid separately from the main bottle, and air-dry all parts completely before reassembling. The CDC’s hygiene guidance on cleaning and storing feeding items recommends air-drying thoroughly and storing items only once fully dry, a practice that applies directly to shaker compartments since trapped moisture in threads is a common cause of mold and odor.
The Just Move 20 oz. Shaker Cup pairs a main mixing chamber with compartment storage built for powders and pills, making it a practical match for a single workout session or a full day of supplements. The Just Move Juice Box offers an alternate form factor for readers who want a different shape or carrying style without giving up built-in storage.
For readers ready to put a shaker to use right away, our Shake Of The Day downloadable recipe PDF offers single-serve recipe ideas sized to fit standard compartments. We back our shaker lineup with the same sample-pack approach we use across our protein line, letting customers try flavors and formats before committing to a full purchase.
Storage-equipped shakers earn their place in a gym bag by replacing three or four separate containers with one. That convenience only holds up if you stay disciplined about drying every compartment fully, since trapped moisture is what leads to odors and mold over time. If you want an easy starting point for what to mix, our Shake Of The Day PDF is worth a look.
— Just
Our Just Move 20 oz. Shaker Cup gives you compartment storage, reliable mixing, and easy cleanup in one bottle built for daily training.
Pair it with our Shake Of The Day downloadable recipe PDF for quick-start recipes sized to fit your compartments, or browse our full shaker cups and accessories to find the setup that matches your routine.
Disassemble every compartment, lid, and agitator after each use, hand-wash the threads and seals, and air-dry all parts completely before storing or reassembling. The CDC’s hygiene guidance on cleaning feeding items notes that storing parts before they are fully dry is a common cause of mold and bacterial growth.
It is fine to leave the agitator or wire ball inside if you are reusing the bottle the same day. For longer storage, remove it during your full cleaning cycle so it can be rinsed and dried along with the other parts.
A standard shaker bottle is a single chamber with a mixing tool, while a compartmented shaker adds attachable jars or a pill tray so you can carry extra servings or supplements in the same container. The compartment design is what lets you combine powder, pills, and your drink in one trip to the gym.
Look for a removable agitator that mixes easily and rinses clean, along with a stainless steel body if you need the shake to stay cold for several hours, according to a 2026 review of insulated shaker designs. Keep in mind that insulated models typically require hand-washing rather than a dishwasher cycle.
Check the compartment’s volume in cc or grams against your usual scoop size, since jars in the 100 to 150 cc range typically hold about 1 to 1.5 scoops of protein powder, per BlenderBottle’s product specifications. If you take multiple scoops per serving or carry pills separately, size up or choose a stackable jar system.
