If you're making them yourselves you can adjust the recipe. Add more setting agent gelatine or change the bloom strength.
Coat them with Sugar/Acid Coating A mixture of sugar and citric or malic acid (in a 4:1 ratio) can be used to coat the gummies. This coating helps the gummies retain their shape and prevents them from melting by creating a barrier that draws moisture away from the candy.
Allow them to air cure, after they have been removed from moulds let them air dry for 12-24hrs, this allows surface area to evaporate creating a slightly firmer skin.
You can buy insulated bubble mailers too.
Hope that helps :)
Coat them with Sugar/Acid Coating A mixture of sugar and citric or malic acid (in a 4:1 ratio) can be used to coat the gummies. This coating helps the gummies retain their shape and prevents them from melting by creating a barrier that draws moisture away from the candy.
Allow them to air cure, after they have been removed from moulds let them air dry for 12-24hrs, this allows surface area to evaporate creating a slightly firmer skin.
You can buy insulated bubble mailers too.
Hope that helps :)