Re: Yes, for sample available, order online please, delivery time 1-3 days;
for customized samples, cost are various according to your artwork, 7- 15 days for pre-production samples;
Re: For Amount less than 5000$, by paypal/western union/online payment;
For Amount over 5000$, by T/T, 50% deposit, balance before shipment;
Re: 1st, check the color with your eyes;
2nd, check the entrance leakness by filling the bottle or jar with water, then up down left to see whether the water is leaking;
3rd, check the bottom of the bottle or jar by puting the it stand up on horizontal desktop to see whether it can stand up singly and smoothly.