Stretch Armstrong keeps best at room temperature. Stretch Armstrong is made of latex rubber filled with gelled corn syrup, which allows it to retain shape for a short time before shrinking to its original shape. An estimated 67 different versions from Japan, Germany, Italy, France, Australia, and other countries released Stretch Armstrong variations between 1976 and the 1990s. The last two were filled with a granular solid in place of the viscous liquid found in the other figures. A vacuum pump, which attached to the heads of these figures, removed the air from within, which "froze" the toy in its stretched position.
Rabbit vibrator silicone (semi-organic polymer), rubber (elastic hydrocarbon polymer) or latex (natural rubber) materials. Silicone vibrators are easier to clean and care for, since this material is not porous, therefore no bacteria or foreign matter is absorbed by the toy. Silicone retains heat and has no odour. Jelly material is porous and cannot be sterilised in boiling water and has a scent of rubber that some find unappealing. In order to escape this smell some producers aromatise the products with more pleasurable scents. Rabbit vibrators made from vinyl, plastic, metal, and elastomer materials can be also found. They are much less porous