These strong and Plastic tumblers are very strong and durable for whatever you may be using these for. 16oz is large enough for whatever you will be using them for like smoothies and even milkshakes. Suitable for drink shop, takeaway shop, parties, events or outdoor use. Safe alternative to glass cups. Packaging is a strong company and has attention to every little piece of detail weather it comes to quality or quantity then be sure to leave your order placed with us and we will sort out all your needs just for you.