The Nip n Sip cuts tippet and opens bottles. Fishing guides and frat guys will tell you that you could use your teeth for both, but please dont. The good Lord gave you teeth for a good reason. And while we agree that both cutting tippet and opening bottles are worthy ends, neither are the intended use for your pearly whites. Unlike your teeth, the Nip n Sip 2.0 comes with blades that are replaceable and a lifetime warranty. If they (or any other part of the tool) stops working they way you think they should, well replace them for you. As an aside, if you find a dentist who offers the same sort of warranty on your teeth, then go crazy.