Butter Knife 5 "Great butter knife but...?" William 16 October 2018 The perfect butter knife what more could you ask for. It butters and it’s sharp enough to cut through the thickets bread. but it does have it’s faults that could do with improving maybe on the next version. 1. Handle is uncomfortable and hard plastic (ergonomic would have been better) 2. The knife itself is too short to get to the bottom of a tall jar If the knife was 2 inches longer it could get into a jar of peanut butter and that kind of let’s itself down a little because it’s a great product but just not long enough to get to the bottom of tall jars.