I use my Stanley Tumblers every day. This is the size I like best

If you’ve been trying to decide whether or not it’s worth spending $45 on a Stanley cup, there’s a good reason to take the plunge. You can buy the ash colored 40-ounce tumbler for $43but most of the other colors are $45 for the same size. Since I’ve been looking at Stanley cups, I’ve never seen them go down in price, so sales are probably rare, with only the 14-ounce tumblr in room Currently $5 off, bringing the price down to $20.

This is what I have experienced with the Stanley cups. And are you looking for a fun koozie for the summer? This Brumate Hopsulator Trio is my favorite and keeps drinks ice cold for hours.

My favorite size Stanley cup

Over the years I have tried several trendy water bottles to encourage myself to drink more water. I have an hourly motivational bottlewhich made me drink maybe three days more water, and I’ve tried to only use disposable bottles to keep track of it better — I know, bad for the environment. But nothing ever sticks, and I drink water again in the evening to refuel. But the cup I’ve really stuck with, because it’s easy to drink water on the go, is the Stanley Cup 30 Ounce.

Here’s What I Thought of Each Size Stanley Cup

I bought three different sizes of Stanley cups to try on Amazon — the 14-ounce in stone ($20), 30-ounce in cream ($35) And 40-ounce in lilac ($45) — and there’s a clear winner. While the 40-ounce would probably be my go-to cup, I often have to lug my energetic 23-pound toddler around, which means I need something lighter to hold my water. That same kid is always following me around, so constantly refilling the 14-ounce cup is out of the question, too — plus it doesn’t have a handle, which is inconvenient. The handle is definitely a game changer.

That leaves the Goldilocks of the bunch: the 30-ounce Stanley tumbler. It’s lightweight, fits in my car cup holder, and is insulated with stainless steel, so I can use it to keep my water cold or my coffee hot. I once left my Stanley tumbler filled with ice water in the car on a 90-degree day, and the water was still cold when I returned hours later.

What I don’t like about Stanley cups

The only downside I have found is that once the straw is in the cup, there is no way to make it leak proof. So when my 1 year old gets a hold of my cup, he spills water all over himself. The straw is removable, but I prefer to use it because it makes drinking water easier (in my opinion).

For more, check out my favorite espresso machine that keeps me out of coffee shops and CNET’s Cliff Colby’s favorite $20 knife.