Built 24oz Shasta Double Wall Tumbler

Absolute garbage. The 'twist on/off cap' requires a tow truck to release it from the extraordinarily lousy design of the threaded top of cup. Same goes for flip up cap to prevent spillage or heat loss. I have to go to my 45 yr old son (not whimpy) to open the damn thing. I threw it in the trash can this morning. But first, I bashed it with a hammer and threw it against an oak tree 3 times to ensure I wouldn't be tempted to retrieve it, to get my moneys worth out of it. Living on soc sec, means that cup was a luxury for me. Thanks for wasting my time, my money and my coffee.