Caffeine enthusiasts have been buying Frank Green products since the company was founded in Melbourne in 2013. Its stylish products include ceramic cups and bottles, reusable bags and reusable straw packs that are an alternative to disposable single-use plastic.

Now Frank Green is releasing a new range for youngsters. The range features five limited-edition monster-themed designs in red, blue, soft pink, pale green and teal.

Called “franksters”, each bottle and cup has a monster face, a name, a backstory and eco mission. There are five characters in total. The teal character, River, lives on a boat where he talks to fish and kicks up a fuss when single-use plastics enter his local waterways. And Skye, the blue bottle and cup, flies to the top of rubbish piles where she does her best to stop them growing.

Each bottle and cup has a ceramic inner layer, stainless-steel outer layer, flip-up-straw lid, drinking spout and carry strap. They are triple-walled to keep the contents’ temperature steady and are BPA free.

The bottles and cups come in two sizes. The smaller 295-millilitre cup is $41.95 and the larger 475-millilitre bottle is $45.95. Each size fits in standard pram, bike and car bottle and cup holders.

Shop the range in select stores and online from October 30.