how can I rephrase this sentence:

My company helds a seminar twice a year for every new product of energy drinks which was produced.

First of all do you want to talk about what happened in the past or what is happening now?

Present Tense = My company holds a seminar twice a year for every new product of energy drinks produced. (I shortened it or change "was" to "is."

Past Tense = My company held a seminar twice a year for every new product of energy drinks which were produced. (OR shorten it to "drinks produced."

Sra