Abstract: A gravity-based filtration apparatus is disclosed. The apparatus may include a container, a filter, one or more elongated slits and a drip stop valve assembly. The container may be configured to receive a fluid, and dispense the fluid from an opening disposed at a container bottom portion. The filter may be disposed in a container interior portion and may be configured to remove impurities from the fluid before the fluid may be dispensed from the opening. The elongated slits may be disposed on a container wall at the container bottom portion. The drip stop valve assembly may include one or more arms or fins that may be disposed in proximity to the elongated slits. The arms may move between a retracted position and an extended position. The drip stop valve assembly may enable fluid dispensation from the opening when the arms may be in the retracted position.

Abstract: An auricular device for noninvasive nerve stimulation can include a first portion configured to secure within an ear canal of a user and a second portion coupled with the first portion and configured to be placed within an car such as within the concha cymba. The second portion can include a nerve effector for modulation of (including but not limited to providing electrical stimulation to) a vagal nerve of the user. A hardware processor can generate a stimulation waveform that is gradual upon every stimulation burst. The second portion can include a first and second prong and the first portion can include an ear canal element. The auricular device can include a stem connected to the prongs, active and return electrodes coupled to the prongs, and a boss coupling the stem and the ear canal element together. The boss can allow the ear canal element and stem to rotate and move relative to one another.