Features: 1. These adorable little test tubes are ideal for kids. 2. They are durable and safe plastic,hard, high transparency. 3. You can filling them with tea leaves, bath salts, dried flowers, etc. 4. Fill them with anything from mini jelly beans, cordial, confetti etc and you have a favour fit for a great party. 5. Reusable,hand washable in warm water. 6. Not suitable for autoclaving.