Default Case to absorb heat from HTC One? Help buying a new phone case

Hey guys Im going to buy a case for my htc one and I want to find one that will kind of absorb the heat that this thing produces, cause lets face it this thing gets pretty damn hot if you use it continuously sometimes. I just want a case that will absorb the heat or one that wont get hot. I don't care if it damages the phone. Just want my hands to not be sweating and uncomfortable when using my phone. Thanks
Current:
Phone: HTC One Developer Edition ~ Rom: SinLessROM GPe v6.6.0 / InsertCoin 2.1.1
Recovery: TWRP v2.6.3.3 ~ ~ S-OFF: Revone ~ Hboot: 1.56

Sold:
Phone: MyTouch 3G Slide ~ Rom: CM 6.1.1 ~ Radio: 7.15.35.16 ~ Recovery: Clockwork Recovery 2.5.0.1 ~ SD: 8GB Class 4 - EXT3: 512 S-OFF: AlphaRev 1.8

Retired:
Phone: T-Mobile G1 ~ Radio: 2.22.27.08 ~ SPL: 1.33.0013d ~ Recovery: RA-Freedom Recovery 1.3.1 ~ Rom: CM 5.0.8 (My Custom Theme) ~ SD: 4GB Class 6 - EXT4: 512 || SWAP: 96