www.themightymug.com

I have used the Mighty Mug for years on my commute to city. I put it on the floor and it is like it is screwed down. Until I left straight up. Then the closure on the larger size cup is great

My mighty mug lid was delivered with lid damaged. Wrote email asking for replacement. Never heard back.

It is just what I wamted.

best mug ever!

We ordered two of the kids mugs (Minecraft) and they have not let us down yet. No spills is a great stress reducer. I had to order more as I ended up giving away my spares. These mugs are awesome. I don't really understand how they work, but they really do!