The nice looking flask reminded me of my graduate chemistry labs, only fancier with the wooden wrapping handle at the waist. Liquids (coffee) cooled too quickly after brewing. I purchase a stainless steel filter, which did not improve the brewing. The paper filters require folding like some kind of origami, so I didn't use them. A disappointing purchase...so I went back to my Keuric self packing pods in order to get real strong coffee flavours.