This Fenix cup features superior insulation. The copper plating on the inner wall protects against temperature transfer, so your ice will not melt even in the blistering sun and that hot toddy will stay nice in warm into the night. On average the copper vacuum insulation can make a difference of up to 9°F (5°C).
Wash before first use. Hand wash recommended. Do not microwave.
Love the feeling of the cup and grip
very well made
Good quality construction.
Keeps my coffee hot for hours.
This is a really excellent cup. The lid isn't spill-proof, but given that I rarely use the lid and instead use it to prolong how long my coffee stays hot at my desk I have to give this a full 5/5 stars. No metal taste, great ergonomics... for a flashlight company, they sure did make a great coffee cup.