Good insulation, but still in need of improvement

isolated well and long. the cover is a hygienic disaster. the stored drink continually delving into the rubber Profen and it must be disassembled and cleaned after each use. Before I started this mitbekahm the lid with stink (I drink tea with milk). After the first separation I lost to whether the accumulated mass in cover almost in control of my stomach. With a little skill can be the lid quickly and disassemble but assemble the mechanical parts are obviously not designed for a daily dissection because they act worn after a short time.
Conclusion: for the money I expected more, I enteuscht Binn!