The first generation cafe cap (in all honesty) was naff! We tried it, tested it and was found wanting- leaked like a sive when the bottle was being carried in a pack, HOWEVER! all is forgiven with the outstanding Cafe Cap 2.0 - we tried it, we tested it and we are very happy!
Leak proof - durable and doesn't effect the temperature inside the bottle (hot still stays hot for the same length of time.) Easy to clean and dishwasher safe, if you have a wide neck Klean Kanteen this is a must have cap for your bottle.