When you flip the Thermos for the park it can run, ie, the steam pressure is collected and the gasket is knocked out

Relatively light weight but feels sturdy. I bought it exclusively for its infuser. One would think that after infusing the tea you would be able to remove the infuser and attach the lid directly to the bottle but it does not fit. Small thing that would have made it perfect.

Excellent thermos, I order the second for my wife. This time we added something similar to a brush for cleaning. Long thought it was. The box of course was crushed on delivery but the goods did not suffer. Shop recommend.

Arrived in time. Fast and efficient.