Our latest DynaVap ‘M’ is deployed for use straight from the VapLab with the intent of providing the highest quality, durability, and experience. The 'M' is constructed from medical grade stainless steel to the exact dimensions of the original VapCap 'M'. The quality of our newest addition remains consistent with our entire line of products with an additional, robust durability. Like all VapCaps, the 'M' arrives equipped with our signature temperature indicating Cap, providing simplicity and efficiency for all.hat restricted. This is normal. Some find they get the best result by taking a long, slow steady draw with the hole completely open, and others will intermittently or lightly cover the air/vapor mix port. The way air flows through the VapCap cools the vapor to provide a smooth experience.