Natural LDPE (low density polyethylene) with a Yorker dispensing tip and red cap.
The Combo Pack contains 36 bottles:
Boston Rounds .5oz (qty. 6)
Boston Rounds 1oz (qty. 6)
Boston Rounds 2oz (qty. 6)
Boston Rounds 4oz (qty. 6)
Boston Rounds 8oz (qty. 6)
Boston Rounds 16oz (qty. 6)