Jones: That's me and my boss opening up a lava ... just water. Yes, that extra coloring is partly for effect, but it also contains chemicals that prevent fungus from growing in the bottle.

The lava lamp achieves its evocative effect through a simple formula. A food-grade glass bottle is filled with a mix of wax and water in contrasting colours. Still proudly made in Britain, each lava ...

A jar or container (we used old bottles, spicy sauce ... reaction between the vitamin C tablet and the water, creating bubbles similar to a lava lamp. Make sure you check with an adult and ...