Insulated martini glasses are made from BPA‑free plastic (some gel models include silicone bands and stainless‑steel components), standard glass, and lead‑free crystal.

Capacities in these listings range from about 7 ounces up to 12 ounces, with 8.5‑oz and 9‑oz sizes commonly offered.

Two common methods are used: a gel‑filled insulated wall (a cooling gel sealed between walls) and double‑walled glass construction. Both help maintain drink temperature and reduce condensation.

Place gel‑filled cups in the freezer (many manufacturers recommend freezing them upside down) and chill for about two hours or longer for best cooling performance.

Most sets in these listings are sold as a pair (two glasses).