Instruction: Answer the given question using the supporting document.

Input:
Question: Is this a suitable option as a 'shaker cup' to mix and shake health drinks in, like protein shakes?
Document: I really like this product. It holds a lot of hot or cold beverages. It also has the great flip top that lets you drink quickly without making a mess. Since glass does not alter the taste of your drinks and is safe, it is the best cup around.
Survived dropping against a granite countertop; holds both hot and cold liquids with ease; spout big enough to have highly viscous drinks like smoothies come out but small enough so that water doesn't splash out all over your face. I got the tea infuser as well which is highly recommended if you like tea. This is what I have been searching for!
Bottle was shipped nicely, and keeps drinks hot/cold like it says. Does not sweat.However, as other reviewers mentioned, the rubber gasket doesn't really work well and it's a trick to get the cover screwed on properly. Also, the flip top does not stay fastened down so leaks are a problem. I would not buy again, but think it's a great concept to improve upon.
I use this at work for both hot and iced drinks. The glass is very tough (I've dropped it a couple of times). I like the lid a lot, which closes to prevent spills and temperature loss, but allows easy access to the beverage. I love the design, too: very simple and classy.I've tried lots of thermal mugs over the years but this one is my favorite. I've gotten rid of the others.
I needed a non-plastic coffee/tea container for my hour commute to and from work. I didn't think I would like it as the pour spout is smaller and the lid doesn't have a locking mechanism. In actuality I can easily drink from the opening, and a straw works perfect for iced drinks. The lid is sloped a little so drinking from the spout is not hard (I have a big nose and hate drinking out of cups that have small openings.
This is the perfect glass. I use it all the time. I have to hand wash it because I can't be without it for the :70 minutes the dishwasher would take! I normally use it for cold drinks with a straw. I really like that it is so convenient around the house and then out the door. Before I found this I would have to transfer whatever I was drinking into a to-go bottle. I hate using plastic products so this glass is perfect.
Love this tumbler! After a few months of use, I feel it'd be good to write a review for a great product like this.I've been searching for a safe drink bottle to carry around, and among a lot of name brand tumblers/travel mugs with different materials that i've purchased (and wasted money on), I love this one far more than the others for the following reasons:1. Glass bottle-- safe. (in my opinion safer than steel for some drinks)2.
This has a bit of a problem if you do not seal the flip top when you shake it, but it is great for using if you don't have to shake too much. I have been using it to store liquids that are opened and have been used but the leftovers can go in this bottle for storing in the fridge.
It's so heavy and durable and looks brand new with each washing. Makes a great gift for the health concious, the tea lover, or the sports and health fanatic. Great award for diet and fitness contests.
You can't go wrong with a glass drinking container, with all the potential health hazards of BPA and other plastics which have come to light during the past decade. This bottle is sturdy, and easy to use. I haven't had any issues with the seal, and it doesn't leak even when held upside or shaken violently. Just make sure to secure the lid and cap tightly, and you shouldn't run into any issues.
Answer: Yes it is. It is very durable and cleans up well. You can definately use it as a shaker cup.