I mostly use the Kanpai for coffee. The regular lid is great to use while carrying the bottle in my pack on the way to work. Once in the office, I switch to the drinking lid. No more spilling in my pack! One day I decided to try it out as a cooler for a special can of beer. I kept the chiller lid in the freezer overnight and put in my can of beer at 7 in the morning. I left the bottle in my pack all day at work and on my bike ride home, I stopped to enjoy my beer and the sunset. At 6pm, the beer was still perfectly chilled!
Yes, it's pricey but the cool factor is high and it's great to have a choice of lids. Snow Peak is really going for the lifestyle marketing right now but their products remain as highly functional as ever.
This review was written in the old system and had content requirements that are different than reviews written today.