We have chosen the packaging that has the best relationship between: low CO2 emissions, safety, functionality and recyclability.
All our packaging is made of bioplastic (I'm Green and TPU) which, in its production cycle, produces far fewer CO2 emissions than traditional petroleum-derived plastic. Furthermore, they are all 100% recyclable.
Before deciding to use bioplastic for our packaging, we tested other types of materials, such as glass or aluminum, and other different shapes, such as jars or bottles. Both these materials and shapes were found to be unsuitable, by our standards, to make travel sets that were leakproof, unbreakable, and easy to squeeze. The tubes allow you to have all the beauty products you need in the smallest possible space, creating compact and light beauty cases that can be carried even in the smallest handbag.
Last but not least, when choosing all the materials for our products we had to comply with the current international legislation on the transport of liquids (LAGs) in carry-on luggages on airplanes which requires every traveler to insert each liquid within 100ml in a clear plastic bag with a maximum capacity of 1 litre.
(See https://transport.ec.europa.eu/transport-modes/air/aviation-security/aviation-security-policy/liquids-aerosols-and-gels_en for more information).