CPV code 33157700 designates Blow bottle in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
33157700 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 33157000 (Gas-therapy and respiratory devices).