Flask accessories are essential for laboratory experiments. Flask supports hold round-bottom flasks and pear-shaped flasks securely upright to prevent spills or damage. The flask support or flask underlay, made of polypropylene or neoprene, accommodates a range of flask sizes. Lead ring flask weights keep labware stable in baths or anywhere flasks might float, spill, or break. Lead weight rings slip over the neck and the red vinyl covering will not scratch the flask.