BlenderBottle GoStak Twist n' Lock Storage Jars, 150cc 2-Pak, Red

I bought two sets (3 in each) of these in the 100cc size. Each container perfectly fits one scoop of my protein powder. It was a little messy to transfer the powder from the scoop to the container, even with a funnel. So, I found that just using the container to scoop out the powder works best. The lids seal tightly enough that you can just rinse and wipe the container after you fill it without having to worry about water intruding when you rinse. I just traveled using these and it was great. All six of my containers nicely attached to each other and it was very easy to just pack the cylinder in my suitcase. They never leaked, came apart, or broke; it worked perfectly. This is a nice travel solution for packing the protein that worked quite well for me. I am very pleased with this purchase and highly recommend.

Love these little containers. I travel a lot doing overnights wherein I take with me my own salt and sugar. The containers come in handy for this. I’ve used them for supplements as well.

Perfect for taking supplements on the road. I travel for a living and use these to take my vitamins and supplements on the road. I’ve never had a leak or a lid come off.

Great containers but they absolutely do not fit anywhere to 35g of protein powder like one review says (only reason I bought them). I could only fit 14g of protein powder in the 100cc container.

I actually bought two of them so I have six and I only have to set up my powder supplements once a week

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.

Travel for work, so wanted something easy I could take protein with. These are the perfect size for one scoop of protein, and 5mg of creatine. Website says they fit in the blender bottles, I prefer my Shaker, but they do fit!

Holds protein powder good. I like how they stack and easy to clean