Reusable gel packs. These are cold therapy packs which contain a form of gel and are kept in the freezer until required. They are reusable and in many cases can also be heated either in very hot water or a microwave to offer warm therapy instead.
A clown car is a prop in a circus clown routine. A common example of such a routine involves an implausibly large number of clowns emerging from a very small car, to humorous effect.
The Joker drives a Vaydor. Vaydor is in the business of turning your ordinary 2003-2007 Infiniti G35 into the kind of car the Joker drives. You donât have to be a supervillain to own one or have a bank account worthy of Bruce Wayne. Vaydor builds fiberglass kits that you can buy for $11,000.