BlenderBottleGoStak Food Storage Containers for Protein Powder, Healthy Snacks, and Portion Control, 40cc, Black (Pack of 4)

Stackable containers for protein shakes, I use it for traveling and I put protein shakes, collagen, etc. in them. Nicely sized, good value for the money. Seem to be leakproof but I don't use liquid.

I use these to take whey protein to work everyday. They stack securely into each other for organized travel, don't open on their own and have just enough space for a scoop of my dymatize. After my workout I take one off the stack, dump it straight into my blender bottle and toss the empty in my bag to bring home for a cleaning and refill.

If you are purchasing these to carry single servings of your protein powder, then the 100cc size is what you want. A single 35 gram serving of protein powder will fit exactly within the 100cc GoStak storage container, with no room to spare. As you can see from the photos I attached, the first picture is of the container with exactly 35 grams of protein powder measured out. The container is filled to the brim, and you have to gently tamp down the powder slightly.This is fine for my uses, since I only need each container to have a single serving of vanilla protein powder. However, if you have additional mix-ins (such as creatine, cocoa powder), you will not have enough room to add them. Different brands of protein powders also have different serving sizes: some brands are 30 grams per serving, in which you'll have a bit more room to spare, but if your brand is 35 grams per serving, than you can fit exactly that and no more.Furthermore, I'm happy to share that the containers fit perfectly inside a Yeti Lunchbox cooler. As you can see from the third picture, the twisted together containers fit in the vertical space perfectly. You'll have enough room to pack a box of food, as well as your utensils and a banana.Overall, I'm very satisfied with the product, but be careful of the size that you need. If you enjoy your protein powder without any add-ins, and a single serving of your powder is between 30 to 35 grams, then go for the 100cc size. Otherwise, you will want a larger size. I'm not sure if the smaller sizes are useful, except for sauces or vitamins.

These are very well made containers and the lids fit on very securely. As others have mentioned the 100cc model will hold a scoop of whey perfectly. There's very little room once a coop is in there so if you need to add anything else it may be difficult. The 100cc is also a great fit for the powders for my pre-workout drink of maltodextrine (32 grams) + 2 scoops of Cellucor C4.I found that the 150cc are useful for a bigger post-workout shake of 25 grams of whey and 40 grams of maltodextrine, it's just about a perfect fit but the container could hold slightly more volume for those who need it.These guys keep me organized and make it simple to get my peri workout nutrition down while at the office. I've used souffle cups, zip top bags but these are by far the most effective method to date. They are a little costly however in this case it's well worth it.

I love these very convenient. I've struggled a lot of my life to find a good container to carry around my protein. So I don't have to carry a big jar or Ziplock bags. These fit the bill

Along with pill vitamins, I like to take a few different powdered supplements daily as well. these containers are absolutely perfect for pre-portioning them and carrying them with me in a neat and compact way. My only complaint would be that they can sometimes be difficult to open, but on the package, they show a method for using one container to help open another and that seems to work well.

These are a good solution for protein shakes. I like the 150cc because they not only handle my shake, but all the added supplements that I include in order to avoid choking down more pills.Pay attention to the instructions on how to open these things. It's not really intuitive, but once you figure it out it makes sens and they're a breeze to open.

great for multi use