What should you use to prevent spills when transferring liquids?

Using rubber stoppers is essential when transferring liquids to prevent spills. These stoppers effectively seal the openings of containers, which helps to minimize the risk of overflow or accidental spillage during the transferring process. This is particularly important in a laboratory setting, where spills can lead to hazards, contamination, and loss of valuable samples.

Rubber stoppers also provide a secure closure for flasks and tubes, allowing for safer handling of liquids that might be volatile or hazardous. Their flexibility and grip ensure that they fit snugly in various containers, contributing to a more organized and safe laboratory environment.

In contrast, the other options serve different purposes: an eyewash station is designed for rinsing eyes in case of chemical exposure, a graduated cylinder is used for accurately measuring liquid volumes, and a first aid kit contains medical supplies for treating injuries. While all these items are important in a lab setting, they do not serve the function of preventing spills during liquid transfer.