Yep Yep, Never once have I heated my syno or tren, and havent had a single problem. It's worthless and stupid, after the whatmans and coffee filters I think its just not as necessary as people make it out to sound. What is heating it going to do? The **** bottle is sealed with the stopper anyways, it's not like any bacteria is going to escape really at all. And if you are venting the stopper with a pin, I'd think any contaminants in the air could still get in the bottle. Maybe I'm wrong, but I think heating gear is much over rated.