What is the ruling on selling a juice box that was bought for 100 dinars and sold for 250 dinars, and is this considered usury (riba)?

Your action is not usury (riba) and is permissible as long as the sale is by mutual consent and involves no deception or fraud; for the Shari'ah has not set a ceiling for profit. Indeed, the Prophet, peace and blessings be upon him, sold two sheep for one dinar, and Az-Zubayr bought land for one hundred and seventy thousand and sold it for one million six hundred thousand. It is part of a Muslim's character to be lenient and kind to people in their buying and selling.