One problem with PVA: It only appears to dissolve. “Think about what happens when you mix salt with water,” says Erica Cirino, an author and communications manager at Plastic Pollution Coalition.

Combine the PVA glue with the bicarbonate of soda. Add a splash of food colouring. Continue to mix the mixture with the contact lens solution. When the mixture starts to come together and doesn't ...

Cover the entire bottle in masking tape to secure the shape. To make your papier-mâché mixture, combine 1 part PVA glue with 2 parts water. Dip each strip of newspaper into the mixture before ...