I have both a shaker and travel tumbler. I love them both. I love the versatility of the tumbler. I no longer have to choose whether to carry something that fits in my bag, but does not fit in the cupholder in my car, or vice versa. Now i am able to have both in one product and I have experienced no issues with leakage. The shaker is also great whether I decide to use it to carry a warm beverage or smoothie. These products are affordable when compared to other brands and have superior performance. My only negatives are that they are not dishwasher safe and delivery was super slow. But I will definitely order more.