This is the worst product I have ever purchased. I'm beyond disappointed. I would give zero stars if I had the option. I vomited in this bag and it was only about 1/3 cup. After only a few seconds of holding the bag, the entire bottom opened up and the vomit ended up all over my lap and on my seat in the car. Unbelievable! What an embarassment! I had to take my pants off in the car and had to cancel my dinner plans because I didn't have a change of clothes. The "one-way valve" is total joke. The bag is not opaque as in the picture. It is completely transparent. This is advertised for vomit and urine. Imagine if someone were to use it for urine. They would have it all over them as well. The seller didn't pack a receipt in my order and there is no way I can return the rest of the bags I purchased. Amazon was only the middle man for this purchase. Don't trust BP Medical. They have my money and I have a totally worthless product.