Analyze the relationship between 'Monster Beverage' and 'energy drink' within the context of the input sentence.
Options: founded by, product/material produced, brand, legal form

Coca-Cola has a track record of minority investments in growth consumer segments, including stakes in coffee company Keurig Green Mountain Inc (GMCR.O), energy drink Monster Beverage Corp (MNST.O) and juice brand Suja Life LLC.
product/material produced