16 OZ

These feel as though their made of good quality material. They have a thick, hard plastic feel to them. Just the right size for my protein powder to go into one of the containers and my shake powder to go into the other container to take with me to work. The 2 containers can connect together or separate them and they can twist onto the bottom of the shaker. The pill containers are in the lids of both containers and twists out for you to use. I'm contemplating on purchasing another set just to have as a spare in case they sell out. Yes, I do recommend this product.

The interlocking containers lock in and are very secure. They are handy when using powder mixes during the day. Just put your powder in the storage container, stop and pick up a cold bottle of water, shake it up, and enjoy. I bought it for me, but my husband has taken it over. He puts his vitamins in one continer, powdered collagen in the other, then mid-morning he grabs a coldbotte of water, mixes his collagen, takes his vitamins, then enjoys his drink. It is good for Crystal Light individual packets. Empty the packet in the small container; or use 2 different flavors of Crystal Light, one in each container. Then, when you want a cold drink, add cold water and ice to the large bottle and add your favorite powdered drink mix. You can mix it fresh. You dont have to carry around the same drink you mixed up before leaving for work. It gets warm throughout the day. The bottle isnt really large. It is just the right size!