it replaces a teapot commissioned there 15 days and whose piston system did not allow to position the lid without filter. this teapot, it has no piston-but has do we really need - however it has a "" funnel "" stainless steel guide which of tea or water, the stainless steel filter has = to the bottom perforations and no liquid remaining in the filter; and stainless steel cover, which keeps heat well, is repositioning on the teapot after we removed the filter that has, for this purpose, a small cove handy. I am delighted with this product and recommend it.