Dental stainless steel square box high temperature and high pressure is better with holes or without holes

Non-porous. Dental hospitals in the stainless steel square box high temperature and high pressure is used to keep warm, there are holes in the air leakage, insulation effect is poor, no holes in the insulation effect is good, so it is no holes in the good. Stainless steel bottom box is actually a stainless steel as a material, according to its use through the production process and become a box, this box is mainly is used as a lunch box.